Fig. 8 is a short arcade game by Intuition Games in which you control a bike, scoring points and navigating around drawings of technical diagrams on white space. The front wheel of the bicycle draws a red line, while the back wheel creates a blue one. The score multiplier increases whenever you keep these two lines aligned. There are some other ways to score points as well (grazing a technical diagram, for example).
You can draw a circle around checkpoint markers to save, and if you crash your bike into a diagram you will automatically resume the game from the last checkpoint location circled.