NeoAnim is a way to encode NeoPixel animation into bitmaps. It's a surprisingly easy way to design cool animation (once you wrap your head around the concept).

The pxt-neoanim implements this technique for MakeCode. It also comes with a converter that takes an image and turns into the JavaScript code that MakeCode can understand.

• open the converter https://microsoft.github.io/pxt-neoanim/index
• paste your image
• open https://makecode.adafruit.com
• add the neoanim package (go to Advanced -> Add Package)
• copy/paste the generated code into MakeCode and run!

The image below is an example of possible animation and the editor shows the animation once converted.