heya! welcome!
Noticed you asked me the same question in a dm on reddit, so I thought it’d be best to answer here.
We generally call these kind of effects “animtrails”, and “ribbons” and when you google that/search on youtube you get --if you ignore cghow-- great videos like:
These three should get you going!
Thanks so much, but how do i make the black ends that fade into colour
Look into adding a Curve Sample to your material. Depending on how the input values are with a gradient/curve sample, you can achieve these colors.