I'm admittedly being pedantic here, but Creature's music selection is NOT based on the day of the week! (It doesn't play the same music every Monday.) It's based on the *date*. Creature has five main play tunes, and for a three ball game chooses three of them. It divides the date by five, takes the remainder, and that's the starting song for ball 1. Next ball, the next song in the list is chosen, etc. So what's played on ball 2 today will be played on ball 1 tomorrow, until the cycle repeats every *five* days.