Ben and Gary: He has just asked a question. He hasn't said what for. It's better just to answer.

Archie: with brushless motors, they have 3 wires. If it spins, say clockwise and you want it to spin anti clockwise, you swap over 2 of the 3 wires. There is no set pattern to this, so just swap until it does what you want.

So you know, brushless motors don't reverse direction on a normal brushless ESC. That's why people don't use them for drive motors.