Click on the flag, and it will run an engine that detects if a sprite has not been loaded. Suppose you want to add more costumes. It will be longer, but it will be worth it. Planted Mystery Box costumes: Days, Time, Template (All having 100%) It is for your project to prevent stuff like this: https://scratch.mit.edu/projects/35216638/ (Note the mystery box)
Credits to old Scratch 2.0 games that have lost their sprites/costumes and show this message. (Glass Water has the same color palette as the Voided Costume)
