what?
dollcode is a trinary number, with a ▖, ▘, ▌ denoting the three bit states,
with most significant bit on the left side.
if we were to count from 1 to 16, we would get ▖ ▘ ▌ ▖▖ ▖▘ ▖▌ ▘▖ ▘▘ ▘▌ ▌▖ ▌▘
▌▌ ▖▖▖ ▖▖▘ ▖▖▌ ▖▘▖
this is a simple case of looping through the number, and checking each
modulus 3 section, and replacing it with one of the 3 characters.
see source for the algo, it's simple.