The onStep function runs automatically many times per second. To make the shape move, you increment its centerX or centerY properties.
When the user the mouse, the program leaves a trail of randomly–colored, semi–transparent circles spaced along the drag path. If the user presses the spacebar , the trail is cleared. 6.3.5 Cmu Cs Academy
A: It builds directly on 6.3.4. If you struggled there, review traversing a 2D list before attempting 6.3.5. The onStep function runs automatically many times per second