Click the (colour changing) flag and then move your mouse around :3 (mama butterfly had way to many baby butterflies...)
@TheGobletOfFire5000 made an Owlette and Gekko colour change and I thought that was a good idea sooooo I made one of my own https://scratch.mit.edu/projects/127973107 and https://scratch.mit.edu/projects/127972287 if you want to see them
