I've been using the pebble app, the white on red text means low battery, so sounds like you're out of juice.
Is the power cable connected ok? Make sure it's plugged in, switched on, and attached to the watch the correct way round. Leave it for a few hours, then press the button (think it was just a short press when I did it).
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
I've been using the pebble app, the white on red text means low battery, so sounds like you're out of juice.
Is the power cable connected ok? Make sure it's plugged in, switched on, and attached to the watch the correct way round. Leave it for a few hours, then press the button (think it was just a short press when I did it).