This is a small variation to the detailed work done by ghostgirl. I just added colored spheres in a couple of originally empty holes using the Bambu slicer with 0% fill.

Even though I arranged the ball colors so that there would only be a single AMS color change per layer, the amount of poop is excessive (as you can tell when slicing the project). So much so, that my poop bucket backed up into the P1S chute, and I ultimately had my head surrounded by hot filament.

I had to remove the print from the plate to fix my “melt down”, but was able to use the cut feature in the Bambu slicer to separate the project at the layer where my failure occurred, and then only print the top part of the tree that got cancelled.

In the dark with the tea light, the red and green balls look dark grey to black, and the yellow balls tend to blend in with the white filament of the tree - so no striking colors at night as I had hoped. However, the colored balls do add some color to the white tree filament during the day.

Again, beware of the filament poop and tower waste, long run time, and be sure your poop chute isn't going to back up if you run at night or when away!