Helping me tell the time?

I always put you on the playmat when you're awake so that I can cook. Every 10-15 minutes or so I will run out, shout your name and check on you. I always put u facing the mirror so that you can entertain yourself. A few days ago, when I checked on you, you turned about 45 degrees, sometime later, you were all the other way around. You were like the hands of a clock going around. Is this a step towards rolling over?? Or a sign that you will be very mobile when you learn how to. You're still very lazy on the tummy though.