And Finally,

 a post in color,

I find watching dominoes fall strangely satisfying, so here is a video from domino artist Flippycat who demonstrates the use of vertical domino falls with different-colored dominoes, as an aside he gives credit to the vertically falling dominoes to Wdomino, called the "Vertical Stair Tower", so I will be grabbing a mug or two of coffee to watch the 'how to do it' video.