Bounce off the edge

Move the sprite forward every tick and flip its direction automatically when it reaches a stage edge.

whenGreenFlag(() => {
  forever(() => {
    move(5);
    ifOnEdgeBounce();
  });
});

The sprite travels in its current direction and reverses when it hits a wall. Change 5 to a larger number for faster movement.

Note

ifOnEdgeBounce flips the sprite’s direction horizontally or vertically depending on which edge it hit. The sprite’s rotation style affects whether it visually flips. Set it to left-right in code if you only want horizontal flipping:

setRotationStyle(Sprite.RotationStyle.LEFT_RIGHT);

Try this next

• Move with arrow keys — let the player control the direction instead of bouncing automatically
• Animate a sprite with costumes — cycle costumes while the sprite bounces around

Functions used

• whenGreenFlag — run code when the green flag is clicked
• forever — repeat a block of code indefinitely
• move — move forward by a number of steps
• ifOnEdgeBounce — bounce off the edge of the stage if touching it
• setRotationStyle — set how this sprite rotates when its direction changes

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