How do you script a shop?

I need the shop to pop up whenever somebody touches the brick that the script is in. I already know how to make GUIs I just need a script. Any answers?

Well, sorry that you can't request scripts on this site, but I'll give you an idea of what you'll need in your script!

Okay, initially, you'll need an ** onTouched** function for the beginning, then, you'll need to :Clone() the GUI into the Player's GUI.