WS2811 RGB strip Leds

http://www.espruino.com/Breadboard ? There's a buying link at the bottom.

or the pins on the board itself? http://www.espruino.com/Pin+Strip (again, buying link there)

I can't figure out from the picture which colours go where, but looking at an eBay link, the light itself should have DIN, GND and 5V marked on it all the way along.

I think the end you want to connect to is the one with the single plug (and you just want to tape up the other end) - but I'd check what it says on the lights (one end of each little section should have DIN on it, the other should have DOUT or nothing).

You then just connect as in the tutorial - Gnd->gnd, 5V->Bat, and DIN->B15. If you want to know for sure, take a zoomed in picture of one end of the LED strip and I'll see if I can work it out.