Stepper motor to rotate the simplest is to give to each crossed to curl in the following order. 1a 1b 2a 2b, it is one that passes Step 1 a control method called this a "Wave Drive.
Making Stepper motor rotation is super easy. The cost to attend to each coil, respectively, following on 1a 2a 1b 2b, it shall be passed to the 1 Step this way to control the "Wave Drive.