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Hi here,Very cool project. I have a few questions.Since this relies on nodemcu, the library for the ws2812, recommends to call initialize first. Isn't that necessary? It does also mention that it will use GPIO2, how do yo get it to work with GPIO5?http://nodemcu.readthedocs.io/en/master/en/modules...If I open led-matrix.html in a browser, it does neither let me choose any colors from the palette nor any dots of the matrix. Is that normal?Keep up the good work.Xie xie