void main()
main: scope:[main]  from
  [0] phi()
  to:main::@1
main::@1: scope:[main]  from main main::@4
  [1] main::i#2 = phi( main/0, main::@4/main::i#1 )
  [2] plot::x#0 = main::i#2
  [3] call plot 
  to:main::@4
main::@4: scope:[main]  from main::@1
  [4] main::i#1 = ++ main::i#2
  [5] if(main::i#1!=$b) goto main::@1
  to:main::@2
main::@2: scope:[main]  from main::@4 main::@5
  [6] main::j#2 = phi( main::@4/0, main::@5/main::j#1 )
  [7] plot::x#1 = main::j#2
  [8] call plot 
  to:main::@5
main::@5: scope:[main]  from main::@2
  [9] main::j#1 = ++ main::j#2
  [10] if(main::j#1!=$b) goto main::@2
  to:main::@3
main::@3: scope:[main]  from main::@5 main::@6
  [11] main::k#2 = phi( main::@5/0, main::@6/main::k#1 )
  [12] plot::x#2 = main::k#2
  [13] call plot 
  to:main::@6
main::@6: scope:[main]  from main::@3
  [14] main::k#1 = ++ main::k#2
  [15] if(main::k#1!=$b) goto main::@3
  to:main::@return
main::@return: scope:[main]  from main::@6
  [16] return 
  to:@return

void plot(byte plot::x)
plot: scope:[plot]  from main::@1 main::@2 main::@3
  [17] plot::x#3 = phi( main::@1/plot::x#0, main::@2/plot::x#1, main::@3/plot::x#2 )
  [18] SCREEN[plot::x#3] = '*'
  to:plot::@return
plot::@return: scope:[plot]  from plot
  [19] return 
  to:@return