program choinka;

uses graph, crt;

var
i,j: integer;
znak:char;
s:array [1..300,1..3] of integer;
b:array [1..20,1..4] of integer;

procedure menu();
var
gm,dm: smallint;
i,j: integer;
begin
     gm:=d8bit;
     dm:=m800x600;
     initgraph(gm,dm,'');
     setcolor(2);
     line(1,550,800,550);
     setcolor(2);
     line(400,550,400,100);

     for i:=1 to 15 do
     begin
          setcolor(2);
          line(400,50+i*25,400+i*25,100+i*29);
          setcolor(2);
          line(400,50+i*25,400-i*25,100+i*29);
     end;

     for i:=1 to 300 do
     begin
          s[i,1]:=1+random(799);
          s[i,2]:=1+random(550);
          s[i,3]:=0;
     end;

     for i:=1 to 50 do
     begin
          b[i,1]:=10;
          b[i,2]:=10;
          b[i,3]:=random(13);
          b[i,4]:=1;

          bar(b[i,1],b[i,2],b[i,3],b[i,1]);
     end;
end;

procedure snieg();
var
i,j: integer;
begin
     for i:=1 to 300 do
     begin
          if s[i,2]<540 then putpixel(s[i,1],s[i,2],s[i,3])
          //else if s[i,1] mod 2 = 1 then putpixel(s[i,1],s[i,2],15)
          else if random(1000) mod 10 = 3 then putpixel(s[i,1],s[i,2],15)
          else putpixel(s[i,1],s[i,2],s[i,3]);
          s[i,1]:=s[i,1]+2-random(5);
          s[i,2]:=s[i,2]+1;
          if s[i,2]>550 then s[i,2]:=1;
          if getpixel(s[i,1],s[i,2])=15 then s[i,3]:=0 else
          s[i,3]:=getpixel(s[i,1],s[i,2]);
          putpixel(s[i,1],s[i,2],15);
     end;
end;

begin

     menu();
     repeat
           snieg();
           delay(25);

     until(i=1000);


     readln;
     readln;

end.