This is project makes it super easy to define and use variables and lists within your project, and without any hacked blocks. To use, just backpack the "engine" and "storage" sprites and drag them into your project
This was an original idea I had to "create" lists by storing them in clones. This is actually a remarkably simple method, it just requires some lesser-known techniques. The downside is that clones tend to be laggy, and this is probably much slower than accessing a list item the normal way. Also, it doesn't really work on run without screen refresh for reasons I don't fully understand.