Can't find library for 4-wire LED strip

Well just about to go to bed here.

You can use them by employing a library, but that still requires the interrupts to be off when you drive them.
You can also bit bang the data at them, this will be slower but will allow interrupts to be on for things like serial data, and servos, which don’t work when the interrupts are off. Use port addressing rather than digitalWrite for the maximum speed.