Now X and Y coordinate cycles too

tisdraw.txt

 SWP
 MOV ACC LAST
 JMP B
-Z:MOV 0 LAST
+Z:MOV 21 LAST
 JMP B
-BIG:MOV 21 LAST
+BIG:MOV 0 LAST
 
 @4
 B:MOV ANY ACC
 SWP
 MOV ACC LAST
 JMP B
-Z:MOV 0 LAST
+Z:MOV 34 LAST
 JMP B
-BIG:MOV 34 LAST
+BIG:MOV 0 LAST