uses GraphABC; 
const
  Rotate = 40;

var
  Ang: integer;

procedure Draw(x, y, l, angle: real; s: integer; toRight: boolean);
begin
  var ang1 := DegToRad(angle);
  var cx := x + l * Cos(ang1); 
  var cy := y + l * Sin(ang1); 
  
  SetPenWidth(s);
  Line(Round(x), Round(y), Round(cx), Round(cy));
  if l > 1 then 
  begin
    var l2 := l * 0.7; 
    l := l * 0.5; 
    if s > 1 then Dec(s);
    
    var ang2 := angle + Ang;
    var ang3 := angle - Ang;
    if toRight then 
    begin
      Draw(cx, cy, l2, ang2, s, toRight); 
      Draw(cx, cy, l, ang2 + Rotate, s, toRight); 
      Draw(cx, cy, l, ang3 - Rotate, s, toRight); 
    end 
    else 
    begin
      Draw(cx, cy, l2, ang3, s, toRight); 
      Draw(cx, cy, l, ang2 + Rotate, s, toRight); 
      Draw(cx, cy, l, ang3 - Rotate, s, toRight); 
    end; 
  end; 
end;

var
  ToRight: boolean;

begin
  var W := Window.Width; 
  var H := Window.Height; 
  
  SetWindowIsFixedSize(true); 
  ClearWindow(clBlack);
  LockDrawing();
  
  SetSmoothingOff();
  
  var X := 0; 
  var N := 5; 
  for var i := 0 to 10 do 
  begin
    var j := Random(60);
    if j mod 2 = 0 then ToRight := true else ToRight := false; 
    
    j := Random(2); 
    case j of 
      0: SetPenColor(clPink); 
      1: SetPenColor(clRed); 
    end;
    
    Ang := Random(20); 
    Draw(X + Random(10), H + Random(10), Random(100), -90, 3, ToRight); 
    Inc(X, W div (N + 1)); 
  end;
  Redraw();
end.