- Make the athlete sprite move right and left when the right and left arrow keys are pressed using "if" blocks and "key pressed" events.
- Add a "set rotation style" block to keep the sprite from flipping upside-down.
- Make the sprite move in the direction it's facing with a "move" block.
- Use a "forever" loop to make the athlete keep moving as long as a key is pressed.
- Start the game with a "when flag clicked" event.