10 d
 0,1
120 X=INT(318*RND(1))+1
130 Y=INT(1*RND(1))+1
140 d X,110,160,0,1
150 X=INT(318*RND(1))+1
160 Y=INT(220*RND(1))+1
175 d X,112,X,220,1
180 d140,118,180,218,0
190 GOTO 120