to reset and restart it click the green flag or do 'left' 'down' and then 'space'. up arrow-pen down left arrow-stop script and reset position down arrow-reset pen right arrow-pen up space-start creating the circles H-hide sprite
This project has 2 stages (draw and erase). It takes about 2 minutes to get through each stage. There is an indicator in the upper left corner showing which quarter of the stage it is in. It goes green > yellow > orange > red.