| 10 PUT &2, 12 | |
| 20 X=0: Y=0 | |
| 30 P=X+16*Y+1 | |
| 40 @D(P)="X" | |
| 50 GET &2, A : IF A=0 THEN 50 | |
| 60 A$=A | |
| 70 @D(P)=" " | |
| 80 IF A$="4" AND Y>0 THEN Y=Y-1 | |
| 90 IF A$="3" AND Y<1 THEN Y=Y+1 | |
| 100 IF A$="1" AND X>0 THEN X=X-1 | |
| 110 IF A$="2" AND X<15 THEN X=X+1 | |
| 120 IF A=10 GOSUB 200 | |
| 130 DELAY 300 | |
| 140 GOTO 30 | |
| 200 PRINT "Selected", X, Y | |
| 210 DELAY 500 | |
| 220 RETURN | |