I put the LEDs in the mold and soldered the ground together, then added positive rails for each color LED. Then I took it out of the mold and soldered it to the circuit board.
I also had to fix a couple of problems with my code (the pinout for the NodeMCU is confusing...)
Last, I painted over one of the on-board LEDs so that it wouldn't be so bright and distracting.
This was a fun little project that helped me to learn about how to use WiFi with Arduino boards.
Hope you liked my idea!