Fade on roll-over

easy question # 5
without people like you out there i’d be in knee deep.

i have a motion tween of a logo. it slowly fades out the logo, revealing below it the same logo with different colours.

how do i get the motion tween to start on the mouse-roll-over in my normal comp? and then to go back to frame 1 when the mouse rolls off?

any thoughts?

thanks people.
a.