First test on Web-Bluethooth with Espruino.
Remember that you can only have ONE of the HTML files open at any time
The first test turns the LED on the unit on and off: https://paalskjetne.github.io/PuckTest/test.html
The second test turns the LED on the unit on and off but plays a bit more with the colors: https://paalskjetne.github.io/PuckTest/test2.html