How do I make a Gui mouse interface?

Hi everyone, I am fairly new to unity and I have little experience working with the GUI. What I need for my game is to be able to click on a spot and create a dot at the point, and while holding down the mouse button down have an arrow that follows the mouse from the dot to the mouse point, and when the mouse is released the dot and arrow disappears.

I have no idea how to do this, any help would be welcome.

Thanks