me ges thats 4 points...(-3,1) (1,4) (4,0) (0,-3)
its quite a bit av teedeeus werk...get slopes av lines tween yer points
from point 1 tu point 2: deltax=4, deltay=3, slope=3/4
from point4 tu point 3: deltax=4, deltay=3, same slope, so it parallel abuv line
from 2 tu 3...deltax=3, deltax=-4, slope=-4/3
this is perpendikular tu line from point 1 tu point2 (slope2=-1/slope1...90 deg angel)
Then yu need tu keep going around the points