How to create an animated icon?

I created a new project on a free drawing software called gimp remembering to set the canvas size too 50 by 50 pixels. I then manged to create my animation by getting several frames from a video sizing them down to fit the 50 by 50 pixels and putting them each into separate layers, once each frame was aligned in the correct place I exported it as a GIF and selected 'Save as animation' and I had my animated NS icon.

also make sure that the more frames you put in the lower the quality because the ns icon must be under 8kb