Take the wood plate of 3mm thickness and laser cut it (we put the image in the file)

Take also the acrylic sheet and laser cut it (we put the image in the file)

3D Print all the pieces ( in the files ) 

put two spring inside the stamper.

Puts all the pieces together.

put a button (connected to the GND and a pin)

Take a basic pen

put a round piece of metal on the tip of the pen connected to a pin

put a button in the pen (connected to the GND and a pin)

weld all the nine neopixels together ( one cable is connected to 5V one in the GND and one in a pin)

The code is in the project files

take a metal piece of 3mm thickness preferably

Or take  a more thiner piece of metal

Cut it in 9 squares of 5*5cm

and glued this in the holes of the acrylic sheet

All those metal pieces are connected each one in a pin of the arduino

It's in the files

In the files