anyone know the sabrina the teenage witch theme song...if it is actually a song, or just something that was created for the show.

the lyrics i have are:

Life's changin' around me
And I'm gonna make it mine
I'm reachin' out and livin' by my rules
Time's movin' way too fast
I wanna make it last...
'Cuz I'm out on my own now
And I like the way it feels.

thanks!