xphoon - phase of moon for X11

Fetch the software.

Xphoon sets the X root window to a picture of the moon in its current phase, including the partial lighting of the dark side by reflected earthlight.

See also: phoon, xantfarm, xbouncebits, xsplinefun, xsquig.
Plus Phoon, the Java version.
ACME Labs / Software / xphoon