10 GRAPHICS 8:POKE 87,7:POKE 710,0:POKE 709,14
20 COLOR 1:PLOT 10,5:DRAWTO 10,70
30 PLOT 40,5:DRAWTO 40,70
40 COLOR 2:PLOT 20,5:DRAWTO 20,70
50 PLOT 41,5:DRAWTO 41,70
60 COLOR 3:PLOT 30,5:DRAWTO 30,70
70 FOR X=I TO 3:COLOR X:POKE 765,X
80 PLOT X*25+60,5:DRAWTO X*25+60,70
90 DRAWTO X*25+40,70:POSITION X*25+40,5
100 XIO 18,#6,12,0,"S:"
110 NEXT X