You can now attach the FeatherWing to the vertical support of the laser cut acrylic using the M3 standoffs, screws, and nuts. 

Place a standoff in each of the four holes, then affix a nut to the back side.

Place the FeatherWing over the four standoffs and secure with the four screws.

Attach the LED wiring to the screw terminals of the TerminalBlock FeatherWing, using this circuit diagram as reference.

With a potion-filled test tube in each slot of your rack, push a UV LED into the hole of each stopper and then place the stoppers in the test tubes.

Connect the Feather to the wall power adapter using the USB cable, and then plug the adapter into a wall outlet.

Now, turn down the lights, turn the FeatherWing power switch to ON and enjoy the spooky, mad science light show!