Note: This is my 1st time programming with lists, but I have looked at the Scratch Wiki, and I understand what the "list blocks" are used for. READ THE PROJECT NOTES! I am working on a secret project, and I wanted to have an achievement system in the game. The game is expected to have 20 achievements, but I wanted the achievements to be hidden until they were unlocked, so I made 40 costumes for the sprite. I decided to use a list for programming the achievement system to determine whether the actual achievement costume appears when the left/right buttons are pressed, or whether the "Not Unlocked" costume appears. I have not programmed most of the achievement system yet, but I have run into a problem with the script that I programmed, even though the scripting seems logical. Please download to see the script, and if you can help, write suggestions in the project comments.