Trying to make something really cool with just one line was a real creative roadblock for me, so I thought about some ways to sneak past the limitation. Here is a simple space invader-esque shooter demo. Although it may look like there are multiple lines, there is actually only one line during any single frame. The way it works is that frames are shared between each of the lasers, such that every in every frame, a single different laser is rendered. The result is somewhat flickery, but it gets the job done and it emulates having multiple lines without actually having multiple lines at any instance.