Hello could you help me? I would like my BillboardS to be activated by moving the mouse over the gui

Please I would like to know how it is like an example as a tower defense in zombies when you pass over it a gui is activated and its health bar stats come out I just need to activate it by passing the mose on the zombie

This is scriptinghelpers.org, however you want us to spoonfeed you a script.

Here's a thread to get you started.