Try to make the brain sim work with neopixels

[mmoskal]

With the following program, I don't get desired rainbow display:

light.setLength(12)
light.setAll(0xff0000)
forever(function () {
    pause(500)
    light.showAnimation(light.rainbowAnimation, 500)
})

@pelikhan any chance you take a look at this?

[pelikhan]

you need to specify which neopixel pin you want to be used

[mmoskal]

The one named neopixel is ok. Doesn't really matter for this board.