Quantity   Component name
20 × custom triangle PCBs
20 × WS2812B-Mini 3535 addressable RGB LEDs
1 × Adafruit Feather nRF52840 Sense https://www.adafruit.com/product/4516
1 × Lithium Ion Polymer Battery - 3.7v 500mAh https://www.adafruit.com/product/1578
1 × SPDT Slide Switch https://www.adafruit.com/product/805