Book Image

Scratch Cookbook

By : Brandon Milonovich
Book Image

Scratch Cookbook

By: Brandon Milonovich

Overview of this book

Scratch 2.0 is an easy to use programming language that allows you to animate stories and create interactive games. Scratch also gives you the capability of using programming to calculate complicated calculations for you. Scratch Cookbook will lead you through easy-to-follow recipes that give you everything you need to become a more advanced programmer. Scratch Cookbook will take you through the essential features of Scratch. You'll then work through simple recipes to gain an understanding of the more advanced features of Scratch. You will learn how to create animations using Scratch. Sensory board integration (getting input from the outside environment) will also be covered, along with using Scratch to solve complicated and tedious calculations for you. You'll also learn how to work through the exciting process of project remixing where you build on the work of others. Scratch Cookbook will give you everything you need to get started with building your own programs in Scratch that involve sounds, animations, and user interaction.
Table of Contents (17 chapters)
Scratch Cookbook
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Changing the tempo


The last set of blocks we have in the Sound category can help us adjust the tempo of the notes we play. That just means how quickly or slowly the beats play.

Tip

The default tempo in Scratch is 60 beats per minute. The default value of the change tempo by () block is 20. This is good to keep in mind if you begin to change the tempo a lot.

What we'll do now is take a familiar block of code and change the tempo by clicking on the sprite.

Getting ready

Take this block of code from a previous recipe and create it in a new file:

You'll notice in the Sound category the following three new blocks:

We'll now take a look at these.

How to do it...

To change the tempo in your program, follow these steps:

  1. Drag the set tempo to () bpm block between the green flag top hat block and the volume setting block, as shown in the following screenshot:

  2. From the Control blocks category, drag the block to create a new sequence.
  3. Place a change tempo by () block below this, as shown in the following screenshot...