Help with Vex Motor Speed Control Program Pls.....

I am constructing a device for an engineering class that utilizes Arduino and a vex motor. I am having difficulty controlling the speed at which a motor runs. If anyone could point me in the right direction or give me a code that allows speed control of motor that would be greatly appreciated.

What you need is to read the sticky at the top of the forum. The one that says "Read this BEFORE posting here". The one that says to post your code. The one that says to provide as much detail as you can.