How to Make a Laser in Stop Motion Pro

I wanted to know how to make a laser in my video, because my school cannot afford Adobe After Affects. So i was thinking of simple ways to create a laser in Stop Motion Pro so i found some clear red plastic string.

Step 1: Setting up the Laser

Set up your laser stand where you have your green screen and rap it around the stand and tie it. Now tape it to any where, but make sure that you are level. Check out this video on how to set up your green screen.