uses Crt, Graph;

var
  GraphDriver, GraphMode : Integer;
  Palette                : PaletteType;

begin
  GraphDriver := Detect;
  InitGraph(GraphDriver, GraphMode, 'X:\BP');
 Randomize;
 if GraphResult <> grOk then
   Halt(1);
  GetPalette(Palette);
 repeat
   if Palette.Size <> 1 then
      SetBkColor(Random(Palette.Size));
    LineTo(Random(GetMaxX), Random(GetMaxY));
 until KeyPressed;
  CloseGraph;
end.