Example 2: Animation And Sound - Raspberry Pi A User Manual

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P A R T I I I
P R O G R A M M I N G W I T H T H E R A S P B E R R Y P I
Figure 11-4:
The Hello World
program
executing in
Scratch

Example 2: Animation and Sound

While Hello World is a very traditional example, it's not particularly interesting. It also fails
to show off the true power of Scratch, which lies in its impressive multimedia capabilities
and sprite-handling system. This system is particularly well suited to simple animations,
which can form the basis of an interactive game.
To begin, start a new project in Scratch by either loading the program afresh or choosing
New from the File menu. As with any starter project, Scratch will provide a default sprite—
it's this sprite that you will be controlling.
To control a simple animation in Scratch, you use the Motion section of the blocks palette.
When you start a new project, this is the default palette. Drag the block labelled
move 10
to the Scripts area. As its name suggests, this block tells the selected sprite to move
steps
10 steps in the direction it is currently facing. The default sprite in Scratch is always started
facing directly to the right—thus, the block will move the sprite 10 steps
move 10 steps
to the right.