Uses crt,graphABC;
var
x,y: integer;
procedure Go(n,m: integer);
begin
clearwindow;
setpenwidth(4);
setbrushcolor(clyellow);
rectangle(150,150,550,350);
setpenwidth(2);
setbrushcolor(clgreen);
rectangle(x-50,y-50,x+50,y+50);
x:=x+n;
y:=y+m;
sleep(1);
redraw;
end;
beginlockdrawing;
setwindowsize(700,500);
hidecursor;
repeat x:=150;
y:=150;
while x<=550 do Go (1,0);<br>while y<=350 do Go (0,1);<br>while x>=150 do Go (-1,0);
while y>=150 do Go (0,-1);
until keypressed;
end.
Так сойдет? :)