To pull off a radar pattern, we'll rotate straight lines around a circle, but we'll need to draw upon our earlier work with colors to make the animated effect. Let's create a new stack of blocks by performing the following steps:
Let's initialize our starting point with the following blocks:
clear
go to x: () y: ()
set pen shade to (50)
pen down
Then add a forever block. We want to repeat the following set of blocks:
set pen size to (1)
turn (90) degrees
set pen color to (15)
move (60) steps
move (60) steps
set pen size to (1)
set pen color to (101)
move (-120) steps
turn (1) degrees
When you run the script, you should get a pattern similar to the following screenshot. As the pattern repeats, the thin, dark lines create a movement around the center point while the background color remains solid. It's a relatively noisy pattern.
Now let's experiment a bit. To...