5 SCREEN 0,0,0
10 CLS
20 SCREEN 1
30 CLS
40 FOR Y  = O TO 100 STEP 2
50 PRINT Y;
60 CIRCLE (150,100),Y,1
70 CIRCLE (Y,3*Y),Y,0
80 NEXT Y
90 WIDTH 80
100 SCREEN 0,0,0
110 END