Macro To Draw Colored Circles

I've recently come across this wonderful site and have found it to be a pool for great information. I looking for some assistance with finding a macro that will draw circles/dots on a worksheet when the left mouse button is clicked at the mouse cursor location. There may be something out there already??? Here's exactly what I need; I want a macro that will draw 7 different coloured circles (blue, pink, cyan, lime green, red, yellow, and orange) on a worksheet. The macro would be activated from a button (7 different buttons- one for each colour) on the worksheet and when the left mouse button is clicked the coloured circle is drawn at the mouse cursor location.