![Black-and-white checkerboard pattern on a red textured floor, with orange-and-green hose laid on top](https://fawny.org/blog/images/Firefit-checkerboard.jpg)
Firefit: Checkerboard
![Black-and-white checkerboard pattern on a red textured floor, with orange-and-green hose laid on top](https://fawny.org/blog/images/Firefit-checkerboard.jpg)
The foregoing posting appeared on Joe Clark’s personal Weblog on 2008.07.11 12:46. This presentation was designed for printing and omits components that make sense only onscreen. https://blog.fawny.org/2008/07/11/firefit-checker/