Multiple lights on a switch loop
I'm remodeling a basement room that currently has one large fluorescent light fixture controlled by a switch loop (switch at end of circuit). I want to keep the switch loop setup, but replace the fluorescent light with about six small recessed can lights. The existing circuit runs on NM12-2 cable, but I know I need to use NM12-3 for the fixture-to-fixture wiring to make this work. I can figure out how to wire the transition from 12-2 to 12-3 at the first fixture and vice-versa at the last fixture, but I'm not entirely sure about how to connect the 12-3 cable to the middle-of-the-run fixtures. Can anyone direct me to a wiring diagram that might show this, or explain how the 12-3 wires should be connected at each light?