Paul_Kroon About the component size: The desciption clearly mentions 0603. The imperial size 0603 equals metric size 1608, which signifies 1.6mm x 0.8mm.

Paul Kroon I have exactly the same issue as raucci: The Red ON/OFF button starts an animation that quite rapidly goes into a mesmerizing blinking in all random colours. The menu and test buttons turn the lights off. Some combinations of buttons will give you a new animation, but whatever happens, the animation will either end in darkness, or in the mesmerizing blinking of all. I cannot figure out how to get animations I want.

Paul Kroon Not on the list. You probably need another type of elco.

Paul Kroon Add "http://arduino.esp8266.com/stable/package_esp8266com_index.json" in the Additional Boards Manager URL's in the Arduino settings. If you have more additional boards to manage, separate them with a comma. Then in Arduino select board "NodeMCU 1.0 (ESP-12E Module)". If you do not have any COM port that represents the board, then make sure that you install the drivers for the Ch340 chip. That should be pretty easy to find on the internet.