//1 решение с ToPoint
uses Drawman;
begin
field(10,10);
ToPoint(1,1);
PenDown;
ToPoint(1,9);
ToPoint(5,1);
ToPoint(9,9);
ToPoint(9,1);
end.
//2 решение с ToPoint и onvector
uses Drawman;
begin
field(10,10);
ToPoint(1,1);
PenDown;
ToPoint(1,9);
onvector(4,-8);
onvector(4,8);
ToPoint(9,1);
end.