Button colour

Hi,

I have buttons with black text. The buttons (not the text) change colour to red when you rollover them. I can’t seem to work out how to get the colour to stay red when it’s clicked. Do I make a duplicate symbol which is already red to replace it when clicked? And I’m also unsure of the actions I’m supposed to use if any??

Sorry, I’m new to Flash! Kinda lost…

thanks