Draw to the display Called by the runtime whenever the display is ready to present a new frame WIDTH — first element of the tuple returned by `resolution()` HEIGHT — second element of the tuple returned by `resolution()` `pixels` — a slice of pixels with `WIDTH * HEIGHT` elements `pixels[x + y * WIDTH]` is the `x`th pixel in the `y`th row, with `(0,0)` starting in the upper left corner of the
(&mut self, _pixels: &mut [Pixel])