This page is my current best guess at the semantics of Ward Cunningham's Biota language. I would welcome corrections. The source is in biota.js
Start by selecting a sample or Show your own program below. Even columns are code and data. Odd columns have control characters: '$' for the program counter, '#' for the data counter.
g$g g r t g g g 1#. 3 #
. . c . . . s . . t g t t t . t . .$d t s . . b . b . s s . 1#2 3 4 5 . s s . b . b . . s t u d t t t t t t g t . . s . . . c . .
data counter direction
Press Run or Step to single step the program and see the counter positions update. The program counter is red and the data counter is green.