
void main()
main: scope:[main]  from
  [0] main::i = 0
  to:main::@1
main::@1: scope:[main]  from main main::@1
  [1] SCREEN[main::i] = '*'
  [2] main::$1 = main::i
  [3] main::i = ++ main::i
  [4] if(main::$1<4) goto main::@1
  to:main::@return
main::@return: scope:[main]  from main::@1
  [5] return 
  to:@return
