Ответ:
field(6,3);
topoint(1,0);
pendown;
topoint(2,1);
topoint(1,2);
topoint(0,1);
topoint(1,0);
penup;
topoint(3,0);
pendown;
topoint(4,1);
topoint(3,2);
topoint(2,1);
topoint(3,0);
penup;
topoint(5,0);
pendown;
topoint(6,1);topoint(5,2);
topoint(4,1);
topoint(5,0);
end.