3D Printable Mood Lamp

I designed mood lamp with tinkercad for camping lantern and gift.
I wasn't confident with the electronic circuit, so I used the LED lights sold by Ali Express.
(Wireless power, rechargeable, 24 LEDs, 6$)

The mood lamp is a rectangular shape that is long horizontally, and only the front part is made to produce light.
So I printed out the front part with a natural PLA.
And I print out letters and pictures with black PLA and attach them to the front part with instant glue.
(If you have a multi-color 3D printer, you can do it comfortably.)
Since I will attach the front part of the case separately, I left the front part of the case empty, and I made a hole so that the LED can be inserted to the side and removed.

The LED has a built-in magnet that can be attached to a steel plate.
Attach the steel plate that came with the product to the inside of the case with double-sided tape.
This allows the LED to be attached and removed by magnetic force.
The back of the case is plain, bu