I want to know how to make the colored boxes animate in this video. LividCactus (Me) - Intro [OVERLAY INTRO] - YouTube
Scale and position animation. Some of the most basic After Effects techniques. If you start here, you'll learn how to do that pretty quickly. However, you should go through the rest of the resources there even after you learn how to animate scale and position, because there is a LOT of complexity to After Effects and having a basic understanding of the whole thing will make you much less frustrated when you work with it.