Draw the number 0 with a black pen that is 2 pixels thick. It is 40 pixels wide and 80 pixels high.

The turtle starts at the center of the canvas, facing east. This is the bottom-left corner of the number.

1. Put the pen down and draw to (40, 0).
2. Draw to (40, 80), then to (0, 80).
3. Draw back to (0, 0) to close the shape.