penup;
moveto 10,10;
pendown;
forward 30;
left; 
forward 30;
left;
forward 30;
left;
forward 30;
penup;
moveto -20,-10;
pendown;
forward 20;
penup;
right;
forward 10;
right;
forward 10;
right;
pendown;
forward 20;
