The Hofstadter Esoteric Programming Language

Hofstadter's Law: It always takes longer than you expect, even when you take into account Hofstadter's Law.

The Hofstadter esoteric programming language executes every line concurrently, in round-robin style. There are only 8 commands and each line can only store a single string value.

The commands are as follows:

Lines are 1-indexed. You can swap with lines that do not exist as extra storage (but they must be positive numbers). Line 0 always contains the empty string, no matter what you swap to it (@0 is effectively a clear). When lines restart or end, they retain their value. Commands are expected to be space separated.

Example: Counting to 99.

Todo.

Example: Two digit adder.

Todo.