Player2 will be controlled by the Up Arrow, Left Arrow, and Right Arrow keys.
- Use Up Key to have player2 .move_up() 30 pixels when the Up Arrow key is pressed.
- Use Left Key to have player2 .move_left() 30 pixels when the Left Arrow key is pressed.
- Use Right Key to have player2 .move_right() 30 pixels when the Right Arrow key is pressed.
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