Here is the original tutorial (Documentation is a work in progress), this fork now supports WS2812 LED Matrices
Should work fine t̶h̶o̶u̶g̶h̶ ̶i̶ ̶n̶o̶t̶ ̶y̶e̶t̶ ̶t̶e̶s̶t̶e̶d̶ ̶i̶t̶ ̶i̶n̶ ̶r̶e̶a̶l̶ ̶l̶i̶f̶e̶ ̶(̶w̶i̶l̶l̶ ̶u̶p̶d̶a̶t̶e̶) won't be tested soon because i don't have any WS2812 ATM