program Deska_Galtona;
uses graph,crt;
var karta,tryb,n,k,i,wi,ko,ilO : integer;
    t:array[0..40] of integer;
begin
  karta:=vga; tryb:=vgaHi; initGraph(karta,tryb,'');
  randomize; bar(0,475,639,479);
  for n:=0 to 40 do
  for k:=1 to n+2 do fillEllipse(k*14+287-n*7,n*5+10,1,1);
  for i:=1 to 400 do
      begin
        ko:=308; wi:=10; fillEllipse(ko,wi,2,2);
        for n:=1 to 40 do
            begin
              setColor(black); setFillStyle(1,black); fillEllipse(ko,wi,2,2);
              if random<0.5 then ko:=ko-7 else ko:=ko+7; wi:=wi+5;
              setColor(lightRed); setFillStyle(1,lightRed); fillEllipse(ko,wi,2,2);
              delay(50);
            end;
        setColor(black); setFillStyle(1,black); fillEllipse(ko,wi,2,2);
        ilO:=(ko-28) div 14; t[ilO]:=t[ilO]+1;
        setColor(lightRed); setFillStyle(1,lightRed); fillEllipse(ko,477-t[ilO]*4,2,2);
      end;
  readLn; closeGraph;
end.