Coeus is an esolang inspired (loosely) by 3-cell brainf*ck. It uses 4 registers (A-D). A is initially 1 and all others are 0.
Y represent any register.
||Print value stored in |
||Multiply A and |
||Swap A and |
Infinite counter starting from 0:
CAT program which terminates upon a user input of 0:
GitHub contains a Coeus interpreter implementation in Common Lisp.