setup

download that library & unzip, add the ledmap (make sure it is named "ledmap") folder to dust/code

at the top of a script or anywhere outside of a function, add lm = include 'ledmap/lib/ledmap'

2011 (4-step brightness) grids

at the bottom of the init function, add add lm:map(g, '2011') (this is the 2011 grid preset, alternatively you can send a table with 16 ints which remap every input level)

function init()
    ...

    lm:map(g, '2011')
end

(note: by convention the grid variable is named g, but the author could've named it something else)

non-varibright grid

same location for the map function. instead of a preset or a table, you can send a single number, i.e. lm:map(g, 8). levels below this number will be low, levels above will be high.

optional: add led:unmap(g) to the cleanup function if you don't want the mapping to persist between sessions, but usually this is not a big deal