Turtle Demo 2

<eval> void REPOLY (int D) { </eval>

if (D > 0){    
  turtle.right(45);   
  REPOLY(D-1);    
  turtle.left(90);    
  REPOLY(D-1);    
  turtle.right(45);   
}   
if (D == 0) turtle.forward(4);

}

canvas.clear(); turtle.move(200,50); turtle.right(90); REPOLY(10);