To assemble the candle, bend the pins so they reach the correct connectors on the Gemma.
- LED data-in to Gemma D0
- LED 5V to Gemma Vout LED Ground to Gemma GND
The LED's data-out pin is not needed and located closest to the flat side of the LED. You can cut it off or just bend it out of the way.
Put a drop of solder on each connection to hold it.