Is my stepper motor wired correctly?

Using Arduino Motors, Mechanics, Power and CNC
6

I always, always... use Darlington Transistors with built in snubbing diodes, for driving motors.
HFE ~1000

PNP http://www.redrok.com/PNP_Darlington_TIP127_-100V_-5A_Hfe1000_TO-220.pdf
NPN http://www.adafruit.com/datasheets/TIP120.pdf