You should probably see normal cell machine made by sam hogan at https://www.youtube.com/watch?v=N-BbgqOjIqk to understand it better. Controls: To move the camera, use WASD or the arrow keys, and to save your codes, click Z and to load them, click L and then paste your code. Click space to change your item, and X to delete everything. You should be able to figure it out.
Huge credit to Sam Hogan for the entire idea. I originally just wanted to do a normal recreation but then I figured out that because of the way I coded it, I could make it infinite quite easily. And I did. Also, the reason the trash bin texture is a X is because the bin texture would be way too hard to render with only pen.