Quine relays
A quine is a program which outputs its own source code. A quine relay is a program whose output is source code for another program, whose output is the source code for another program, …, whose output is the source code for the original program. The length of the quine relay is the number of programs in the cycle. Here is a very impressive 128-language quine relay: github.com/mame/quine-relay The command to install its dependencies is amusing:...