In and Out
In and Out has several "travelers" that come in front the left or right side, fall vertically for a while, and then move back to their side of origin. The background is composed of periods and colons for light texture.
This piece was a bit of an experiment, with mixed results. With some more tinkering, I feel like it could be something more impactful. The code is highly configurable for number of travelers, length of travel, and overall scroll speed.