Scripting - Add Swatches

Hi! Hoping someone can help!

Is there a way to open a file and then start a action/script that will take all spot colors from the file and create small square patches in the file.  These square patches would be filled with the color of the swatches.  For example, if my file had 3 spot colors in it I would end up with 3 squares in my file each one of the spot colors used?

I'm currently doing this manually and hoping to automate some...

Thx!