I don't know what is happening but I'm going to assume you're writing an automated solver for ChuChu Rocket! puzzles until proven otherwise https://www.youtube.com/watch?v=BPhm3BwKWVE

Heh :) ... No, this is actually yet another of my countless attempts at pixel-based image transitions. In this notebook I'm exploring the movement of groups of pixels. The basic rules are that each pixel can only be moved on step at a time, and that no two pixels can be swapped.

The above SVG also acts as an editor, e.g. https://twitter.com/mootari/status/1222638179393720321 Some more background in this thread: https://twitter.com/mootari/status/1306214051874250752

I've added some introductory text and form labels.