%PS%
   % 85 lpi
94.8683  71.5651          %cyan
{abs exch abs 2 copy add 1 gt 
   {1 sub dup mul exch 1 sub dup mul add 1 sub}
   {dup mul exch dup mul add 1 exch sub}
   ifelse}
94.8683  18.4349  2 index %magenta
30.      0.       2 index %yellow
84.8528  45.      2 index %black
 setcolorscreen
/PE where {pop PE}if