Colour Changing LED Christmas Tree

It's January 2019, and I'm just in time for... err.. NEXT Christmas!

The LEDs all start at the same colour but they change colour at slightly different rates. After a few minutes, this provides a lovely random effect. I used a flicker-effect LED with a resistor for the star but, tbh, it just looks like a faulty LED to me!

The body and stand of the tree need to be a minimum 30% fill, for strength. Note that you need to flip the stl for the tree front over, so that the rebated edge is on the top during printing. Do the same for the stand, so that the large flat face is on the deck.

Next, print 21 light beads and one star, at 100% fill (so that there's no infill pattern visible when illuminated). I used clear PLA for these, but I suspect white might work well too.

All the LEDs are a press-fit into the tree front, and simply secured with a dab of superglue as the covers are added. I used 5mm slow changing colour LEDs. They were described as "slow flashing" on eBay but when the