{Setbkcol.PAS}
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 {Sample code for the SetBkColor procedure.}

  uses Crt, Graph;

 var
   GraphDriver, GraphMode: Integer;
   Palette: PaletteType;
 begin
   GraphDriver := Detect;
   InitGraph(GraphDriver, GraphMode,'');
   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.