// I?eia? ec iaeaoa KuMir/PMir
program dragon;

uses GraphABC;

var
  x,y : integer;
  dx,dy: integer;
  turn: array [1..1000] of Boolean;
  a,b,d,t: integer;
  f: Boolean;
  i: integer;

begin
  SetWindowSize(790,500);
  TextOut(5,5,'E?eaay A?aeiia');
  f:=true;
  for a := 1 to 64 do
  begin
    turn[2*a-1]:=f;
    f:=not f;
    turn[2*a]:=turn[a];
  end;
  x:=200; dx:=0;
  y:=140; dy:=-4;
  b:=0;
  d:=1;
  f:=false;
  MoveTo(x,y);
  for a:=1 to 128 do
  begin
    for i:=1 to 127*4 do
    begin
      b := b+d; x:=x+dx; y:=y+dy;
      LineTo(x,y);
      if f and not turn[b] or not f and turn[b] then
      begin
        t:=dy;
        dy:=-dx;
      end
      else
      begin
        t:=-dy;
        dy:=dx;
      end;
      dx:=t;
    end;
    b:=b+d; d:=-d;
    f:=not f;
    x:=x+dx; y:=y+dy;
    LineTo(x,y);
    if turn[a] then
    begin
      t:=dy;
      dy:=-dx;
    end
    else
    begin
      t:=-dy;
      dy:=dx;
    end;
    dx:=t;
  end;
end.