@begin: scope:[]  from
  [0] phi()
  to:@1
@1: scope:[]  from @begin
  [1] phi()
  [2] call main 
  to:@end
@end: scope:[]  from @1
  [3] phi()

(void()) main()
main: scope:[main]  from @1
  [4] phi()
  to:main::@1
main::@1: scope:[main]  from main main::@3 main::@4
  [5] (byte) ypos#2 ← phi( main/(byte) 0 main::@4/(byte) ypos#1 main::@3/(byte) ypos#2 )
  [5] (byte) counter#3 ← phi( main/(const byte) RATE main::@4/(const byte) RATE main::@3/(byte) counter#1 )
  to:main::@2
main::@2: scope:[main]  from main::@1 main::@2
  [6] if(*((const byte*) RASTER)!=(byte) $ff) goto main::@2
  to:main::@3
main::@3: scope:[main]  from main::@2
  [7] (byte) counter#1 ← -- (byte) counter#3
  [8] if((byte) counter#1!=(byte) 0) goto main::@1
  to:main::@4
main::@4: scope:[main]  from main::@3
  [9] (byte) ypos#1 ← ++ (byte) ypos#2
  [10] *((const byte*) SCREEN) ← (byte) ypos#1
  to:main::@1
