I was wanting to emulate Kevin Dart's lighting method on this, which is why it doesn't move. The pink line is supposed to be the scatter of light. 

It's not supposed to! I hadn't noticed that when I made it

Thanks for your feedback! The lines definitely need some work, and I didn't bother with them since it was mostly an experiment on the animation itself. I know what anti-aliasing is but I was going more for the chunky look. 

And ohhhh I hadn't noticed it looked that way! It was supposed to be like a peek-a-boo sort of thing.

You're right! I can't believe I didn't notice that...