1. I downloaded the .png and milled and stuffed the Hello Light board:

Hello Light

2. Attempted to flash it via my Ubuntu Virtual Box. No joy.

3. Reflowed the solder and attempted to flash again. Still no luck.

4. Enlisted the aid of more experienced personnel, namely, Noah Bedford.

5. Eventually, we figured out that the Hello Light board needed to be enabled on the Virtual Box "devices" menu, under the "USB devices" sub-menu.

6. Successfully flashed the board and ran the Python script.

7. Results can be seen below.