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Write your own Raspberry Pi game

Edge detection

Step 09 — Edge detection

We want our fish to reappear if it hits the side of the screen. Drag an “if” block from Control inside the “forever” block, then go to the Sensing category and drag the “touching” block onto the “if”. Select “Edge” from the “touching” dropdown. Drag in a “go to x & y” block from Motion and configure it as in step 8.
 
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