10 frame off clear area box: 5,5,15, 30 for i=6 to 14 print at i,7: repeat$('1', 20) next i ask window: current first$ clear area box: 8,10,18, 35 for i=9 to 17 print at i,12: repeat$('2', 20) next i ask window: current second$ clear area box: 11,15,20, 40 for i=12 to 19 print at i,17: repeat$('3', 20) next i ask window: current third$ delay set window: current second$ delay set window: current first$ delay clear