uses GraphABC;
const
  Size = 100;
  RotationAngle = 45;

procedure RLine(x, y, x1, y1: real) := Line(Round(x), Round(y), Round(x1), Round(y1)); 

procedure Draw(x, y, r, angle: real);
begin
  var ang1 := DegToRad(angle + 90);
  var x1 := x + r * Cos(ang1);
  var y1 := y + r * Sin(ang1);
  
  var ang2 := DegToRad(angle);
  var x2 := x1 + r * Cos(ang2);
  var y2 := y1 + r * Sin(ang2);
  
  var ang3 := DegToRad(angle - 90);
  var x3 := x2 + r * Cos(ang3);
  var y3 := y2 + r * Sin(ang3);
  
  var r2 := r / Sqrt(2);
  var ang4 := DegToRad(angle - 135);
  var x4 := x3 + r2 * Cos(ang4);
  var y4 := y3 + r2 * Sin(ang4);
  
  RLine(x, y, x1, y1);
  RLine(x1, y1, x2, y2);
  RLine(x2, y2, x3, y3);
  RLine(x3, y3, x, y);
  RLine(x, y, x4, y4);
  RLine(x3, y3, x4, y4);
  
  if r2 > 2 then
  begin
    var angm := angle - 45;
    var ang5 := DegToRad(angle - 135);
    var ang6 := DegToRad(angm);
    
    Draw(x + r2 * Cos(ang5), y + r2 * Sin(ang5), r2, angm);
    Draw(x4 + r2 * Cos(ang6), y4 + r2 * Sin(ang6), r2, angle + 45);
  end;
end;

begin
  LockDrawing();
  Draw(Window.Width / 2 - Size / 2, Window.Height / 2 + 100, Size, 0);
  Redraw();
end.