Hi holder23, I'd second Doug's pointer to www.justinguitar.com he has loads of good instructional videos on all aspects of beginning guitar.
I've tried to explain strumming a few times, and it's quite difficult to do this with just text, but I'll give my standard answer, if I can. Strumming is all about rhythm - the beat of the song. To get a basic strum pattern you need to get the rhythm right. Try this......
Put your guitar down. Listen to the song you are learning and hit out a beat as if you are drumming to the song. Now do it again, but only with one hand. The hand you strum with. Get yourself right into the beat of the song, hitting out the rhythm with your hand on the side of your leg or something. You should be able to get a good rhythm going and check what your hand is doing. Hopefully you can see and feel when it's on a down beat or on an up beat. This should be a basic strum pattern. Now transfer that to your guitar. Sounds a bit silly but it really helps. Trust me.
I'm sure I have this on another post somewhere, but written down better. Good luck with it. Once you crack it it feels like you can do anything. Which, of course, you can!
Is anything really made up of zeros and ones??