This is a template to make what I call "Grid-Drops", or costumes that can change up or down, on a grid. The costumes have strange names, but have a meaning. Like, A3-B/1 means Map A, 3-B on the grid, v1. The Map sprite shows all the grids or maps there are. To add more levels, simply make them with correct names, and it should work.
If you use, please give credit. I promise it can go up, but you cant see it here. Also, if you go down, you can't come up unless you click green flag.