Need Arrow To Rotate Around Circle

Hello Community,

I’ve got a quick question for you guys if you don’t mind helping me out that would be awesome!
I’ve been trying to get this arrow to rotate around the circle. I’ve only made one attempt since that is all that I could think of, it did not work out. Take a look at the screenshot below to see what I’m talking about.

Cheers!

76290-screen-shot-2016-08-17-at-122155-pm.png

Make The Arrow a Child of the circle and attach this script to the circle

//javascript
#pragma strict

  public var speed:float = 1;

function Update(){
Transform.Rotate(0,speed,0);
}

NOTE: Remember to always fill in the values of the script given in the Inspector