I don't have one of these displays to test, and I'm no expert...
But give this a try - https://www.dropbox.com/sh/4q2yqq3pxmvr0vc/AAAWd3eWNc_gODwGMo0BF-WEa
The Library gives a function to call with Pixel number and Colour,
So basically it's just dividing the Pitch and Roll values by 15Deg to get a 0 -11 range for the 15Deg steps,
Then if they fall between Pixels (an odd number) then light the Pixel either side at reduced brightness
If the Pitch and Roll give an even number then just light that one Pixel at full brightness on each side.
You'll have to add your code to get the Pitch and Roll values. (this sketch assumes degrees output, change for radians)
This should be easy to change for different colours, or to vary the colour, or to change the step size.
Have fun!
Daza