Polar/Non-Polar Coordinates Help

Ok See the 2 Ice Crystals I want two more of those where the Red Circles are. The problem is that i dont know how to do this. If anyone does would you be as kind enough to help me out? Thanks.

Well one looks like facing of unit, and the other facing of unit + 180 for the back.

Position of (Triggering unit)) offset by <distance> towards Facing of Unit degrees) using sfx , for directly in front of him.

Position of (Triggering unit)) offset by <distance> towards Facing of Unit + 180 degrees) using sfx , for directly in back of him.

one is (100, 20) of unit and the other is (-100, -20) of the unit; if that helps you at all.