1 (null)0
2 (null):GOSUB19:GOSUB21
3 GOSUB20:GOSUB21:END
4 FORS=0TO1
5 FORX=0TOXM:Y=199*X/(2*XM)
6 (null) XM,0,XM+X,100-Y
7 (null) XM,0,XM-X,100-Y
8 (null) XM,199,XM+X,100+Y
9 (null) XM,199,XM-X,100+Y
10 (null) 0,100,XM-X,100-Y
11 (null) 0,100,XM-X,100+Y
12 (null) 2*XM,100,XM+X,100-Y
13 (null) 2*XM,100,XM+X,100+Y
14 NEXT:(null) 2
15 FORX=0TOXMSTEPXM/16:Y=199*X/(2*XM)
16 (null) X,Y,2*XM-X,199-Y
17 NEXT:NEXT:FORX=0TO3000:NEXT
18 RETURN
19 (null)6,14:(null):XM=160:RETURN
20 (null)7,2,14:(null):(null)1:XM=80:RETURN
21 (null)0:GOSUB4:(null):GOTO4