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  • Book Overview & Buying Scratch 2.0 Beginner's Guide: Second Edition
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Scratch 2.0 Beginner's Guide: Second Edition

Scratch 2.0 Beginner's Guide: Second Edition

By : Badger
4.3 (4)
Buy this Book
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Scratch 2.0 Beginner's Guide: Second Edition

Scratch 2.0 Beginner's Guide: Second Edition

4.3 (4)
By: Badger
Buy this Book

Overview of this book

The book uses step-by-step instructions along with full code listings for each exercise. After each exercise, the author pauses to reflect, explain, and offer insights before building on the project. The author approaches the content with the belief that we are all teachers and that you are reading this book not only because you want to learn, but because you want to share your knowledge with others. Motivated students can pick up this book and teach themselves how to program because the book takes a simple, strategic, and structured approach to learning Scratch. Parents can grasp the fundamentals so that they can guide their children through introductory Scratch programming exercises. It’s perfect for homeschool families. Teachers of all disciplines from computer science to English can quickly get up to speed with Scratch and adapt the projects for use in the classroom.
Table of Contents (13 chapters)
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Preface
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Preface
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What this book covers
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What you need for this book
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Who this book is for
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Conventions
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Time for action – heading
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Reader feedback
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Customer support
Lock Free Chapter
1
1. Welcome to Scratch 2.0
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1. Welcome to Scratch 2.0
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About Scratch
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Finding a project for you
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Using Scratch 2.0
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Summary
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2. A Quick Start Guide to Scratch
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2. A Quick Start Guide to Scratch
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Joining the Scratch community
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Time for action – creating an account on the Scratch website
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Time for action – understanding the key features of your account
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Taking our first steps in Scratch
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Time for action – moving the cat across the stage
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Time for action – animating a walking motion with the cat
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Time for action – saving our work
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Introducing forever loops
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Time for action – setting the cat in motion, forever
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Time for action – flipping the cat right-side up
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Adding sprites to the project
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Time for action – adding a second sprite and script
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Reviewing a video-sensing project
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Time for action – reviewing pop the balloon - video starter
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Summary
3
3. Creating an Animated Birthday Card
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3. Creating an Animated Birthday Card
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Introducing the paint editor
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Time for action – painting a happy birthday sprite
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Time for action – drawing a vector image
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Time for action – using the fill with color tool to paint the stage
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Adding gradients
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Time for action – applying a gradient
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Time for action – adding more sprites to address the card
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Initializing a sprite's starting values
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Time for action – hiding all sprites when the flag is clicked
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Time for action – displaying happy birthday
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Specifying memorable names and comments
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Time for action – renaming sprites
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Inserting comments into our code
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Time for action – adding comments to a script
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Transforming sprites with graphical effects
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Time for action – transforming sprites
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Time for action – turning m in a circle
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Time for action – making a sprite fade in with the ghost effect
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Summary
4
4. Creating a Scratch Story Book
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4. Creating a Scratch Story Book
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Designing the outline of a barnyard joke book
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Time for action – designing a clickable table of contents
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Time for action – adding pages to the book
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Time for action – adding a sprite to the Backpack
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Building a joke with say blocks and sounds
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Time for action – making a horse talk with the say block
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Time for action – synchronizing and animating the horse
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Time for action – importing a horse sound
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Positioning a sprite by its coordinates
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Time for action – moving the dog based on x and y coordinates
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Time for action – duplicating, flipping, and switching a sprite's costume
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Composing custom sound effects
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Time for action – creating drum sound effects
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Time for action – integrating the dog's joke sequence
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Navigating the story and coordinating scenes
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Time for action – hiding the table of contents
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Time for action – displaying the dog scene
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Time for action – navigating back to the table of contents
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Summary
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5. Creating a Multimedia Slideshow
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5. Creating a Multimedia Slideshow
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Importing photos as backdrops
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Time for action – importing photos from files
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Working with images
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Adding slideshow controls to display images
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Time for action – flipping through the photos
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Playing and recording sounds
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Time for action – adding a sound from Scratch's library
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Time for action – recording sounds in the sound editor
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Editing sounds
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Time for action – editing a recorded sound
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Time for action – appending a sound
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Time for action – adding sound effects to recordings
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Using x and y coordinates to find the position of the mouse's pointer
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Time for action – using mouse location to hide arrows
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Time for action – providing user instructions
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Displaying a project in presentation mode
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Time for action – presenting a fullscreen slideshow
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Summary
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6. Making an Arcade Game – Breakout (Part I)
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6. Making an Arcade Game – Breakout (Part I)
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Learning about the Breakout game
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Time for action – importing and playing the Pong starter project
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Time for action – adding the left and right arrow controls
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Time for action – determining if the ball is below the paddle
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Time for action – adjusting the center of a sprite costume
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Cloning to create identical sprites
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Time for action – drawing bricks
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Time for action – cloning bricks
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Time for action – breaking bricks when I start as a clone
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Ricocheting with the point in direction block
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Time for action – changing a sprite's direction
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Time for action – setting the starting position and the direction
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Time for action – ricocheting off bricks
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Defining a variable to keep score
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Time for action – adding a score variable
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Summary
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7. Programming a Challenging Gameplay – Breakout (Part II)
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7. Programming a Challenging Gameplay – Breakout (Part II)
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Implementing lives
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Time for action – adding a variable to track lives
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Time for action – checking for game over
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Adding more bricks to the level with a custom block
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Time for action – creating a second brick
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Time for action – drawing rows of bricks with custom blocks
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Time for action – coordinating the ball play
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Increasing ball speed and difficulty
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Time for action – increasing ball speed
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Time for action – decreasing the paddle size based on the clones' costume
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Time for action – detecting when we clear the level
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Keeping the score using cloud variables
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Time for action – keeping a global scoreboard
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Summary
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8. Chatting with a Fortune Teller
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8. Chatting with a Fortune Teller
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Creating, importing, and exporting lists
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Time for action – creating lists to store multiple values
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Time for action – importing fortunes to a list
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Prompting the player for a question
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Time for action – asking a question
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Time for action – validating the seeker's question
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Time for action – selecting a random fortune
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Time for action – counting our fortunes with mod
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Time for action – creating a custom say fortune block
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Time for action – ensuring grammatically correct questions
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Creating a keyword scanner
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Time for action – scanning a text string to build a list of words
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Summary
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9. Turning Geometric Patterns into Art Using the Pen Tool
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9. Turning Geometric Patterns into Art Using the Pen Tool
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Drawing basic shapes
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Time for action – drawing our first square
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Time for action – building on the square
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Time for action – enabling the user to create custom shapes
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Time for action – turning triangles into pinwheels
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Time for action – creating a custom shapes procedure
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Time for action – plotting x,y coordinates to draw a square
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Understanding and using color
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Time for action – coloring our shapes
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Time for action – finding a color picker workaround
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Time for action – creating a color palette
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Time for action – limiting color values with a slider
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Creating asymmetrical patterns
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Time for action – creating an explosion
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Turning straight lines into string art
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Time for action – animating a radar screen
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Time for action – breaking out of the circle
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Summary
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A. Connecting a PicoBoard to Scratch 1.4
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A. Connecting a PicoBoard to Scratch 1.4
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Using Scratch 1.4, the PicoBoard, and Raspberry Pi
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Purchasing the PicoBoard
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Time for action – enabling and testing the PicoBoard support in Scratch 1.4
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Animating webcam images by detecting sound
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Time for action – creating a talking head
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Measuring resistance
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Time for action – recording the resistance of a thermistor over time
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Time for action – charting our measurements
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Time for action – revising the graph
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Summary
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B. Pop Quiz Answers
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Chapter 2, A Quick Start Guide to Scratch
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Chapter 3, Creating an Animated Birthday Card
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Chapter 4, Creating a Scratch Story Book
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Chapter 5, Creating a Multimedia Slideshow
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Chapter 6, Making an Arcade Game – Breakout (Part I)
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Chapter 9, Turning Geometric Patterns into Art Using the Pen Tool
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Appendix A, Connecting a PicoBoard to Scratch 1.4
12
Index
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Index

Time for action – adding a variable to track lives

As we make the game more difficult, it will be appropriate to provide the player with more than one opportunity to clear the game. We'll do this by tracking the player's lives, as shown in the following steps:

  1. Create a variable named lives. You can create it For all sprites.
  2. Let's set the starting value of the new variable at the start of the game. Select the ball sprite. Then, add a set () to () block to the when flag clicked stack, which sets the ball's initial position and direction.
  3. Select the lives variable and enter the value 3.
  4. Next, we need to change the logic that ends the game to check for life. To do this, detach the stop (all) block from the wait until (y position) < (y position) of (paddle) block.
  5. Instead of stopping everything, let's decrease the value of the lives variable. Add a change () by () block to the bottom of the stack. Select the lives variable and enter a value of -1 in the by value...
CONTINUE READING
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Scratch 2.0 Beginner's Guide: Second Edition
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