An Introduction to Scratch - Raspberry Pi User Guide - page 133

Ten steps isn't a very large value, so click on the value 10 and change it to 30 . he block should
then read move 30 steps . An animation of a cat moving to the right of the stage isn't that
interesting, however, so switch to the Sound block palette and drag the play sound meow
block to the Scripts area and link it beneath the existing move block. To keep the cat in this
position for a while, add in a wait 1 secs block from the Control block palette. Without this,
the sprite will appear to lick quickly between its starting position and the target position.
To make it so the program can be run multiple times without the cat sprite disappearing of
the edge of the stage, add another move 10 steps block beneath the play sound block
and modify it to read move -30 steps . Scratch will happily allow you to use negative ig-
ures like this: if a value of 30 makes the sprite move a certain distance to the right, -30 will
make it move the exact same distance in the opposite direction.
Finally, add the when [flag icon] clicked block from the Control block palette to the
top of the Script area's stack of blocks to complete the program as shown in Figure 10-5.
Clicking the green lag icon on the top-right of the screen will trigger the program—make
sure you've got speakers or headphones connected to the Pi for the full efect!
Figure 10-5:
he completed
animation
program in
Scratch