After finding an unfortunate lizard which had fallen into our garden sink I 3D printed a staircase to allow any future visitors to escape on their own. This is a modified (resized and broadened) version of the staircase here: https://www.thingiverse.com/thing:3147067
Since the Neopixel LED’s are very bright I made a dome-shaped diffuser of transparent PLA. The sides are made of painted white PLA (brand: Priline) and the “windows” are transparent PLA. To give it some stability and to easily be able to mount / remove from the Arduino I used a prototype board to create a “hat” for the Arduino. That way it can easily be detached if required.