Trying to Make the Northern Lights (Aurora Borealis)

I’ve been working on the Northern Lights (aurora borealis). But, it isn’t working out yet. This is not what I hoped for, not even close considering all the ideas I have tried. This is much smaller and overly simple than other ideas I have worked on. But, I’m ready for a break, fresh inspiration, or at least a chance to regroup. I’ve tried so many ideas. Right now I feel road blocked with it.