Scatter Plot, with legend?

Hi Guys,

I am using a scatter plot to display a bunch of data, each point is an x,y coordinate on the scatter plot. What I wanted to know, if its possible, is can you have all the points be a different colour and have a legend with a name attached to it? Or can you have the name displayed when you highlight over the difference points on the scatter plot?

I have uploaded a small example where I would like a legend listing

One
Two
Three
Four

and the four x,y coordinates to be in different colours.

I hope that makes sense Thanks for the help guys!