An Introduction to Scratch - Raspberry Pi User Guide - page 153

Ten steps isn't a very large value, so click on the value 10 and change it to 30 . The 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 pal-
ette. Without this, the sprite will appear to flick 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 off
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 fig-
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 11-5.
Clicking the green flag 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 effect!
Figure 11-5:
The completed
animation
program in
Scratch