class program {
define halfturn()
    {
    iterate(2)
        {
        turnleft();
        }
    }

define turnright()
    {
    iterate (3)
         {
         turnleft();
         }
    }

define brincaPared()
    {
    move();
    turnleft();
    move();
    move();
    turnright();
    move();
    turnright();
    move();
    move();
    turnleft();
    }

define recorrePista()
    {
    iterate(4)
        {
        brincaPared();
        }
    }

program()
    {

    recorrePista();

    turnoff();
    }

}