Open the Arduino software. Under Tools-Boards, select the Lilypad main board. You need to make sure that the correct board is selected.



Select your port number. It might be a different port for you.



Upload the code to Lilypad main board.



You can copy the Neopixel code from Adafruit’s Github page. Here is the link: NeopixelEarring

Create a new project in the Arduino IDE. Copy the whole code and paste the code you copied here. Then click the "Upload" button and upload the code to Lilypad.

**If you don't work with Adafruit libraries before, you might need to add up the Adafruit libraries.

The code loading process is over, no more work with USB Serial Converter.