But not everything can be an effect. In order for there to be motion or change at all, there has to be something that isn't an effect but an eternal, uncaused first cause-an 'unmoved mover.' We can't go on an infinite regress of causes. When we trace the causal chain back into history, it must end at a self-existent, uncaused first cause.
So when atheists ask, 'Who made God?' they misunderstand the law of causality and the nature of God. They are thinking the God of the Bible is a created, Zeus-like idol...But they have it wrong. If God exists, He is the self-existent, uncaused first cause. Since God created time, He is timeless and eternal. If you're timeless, do you have a beginning? Of course not. Therefore, one reason God had no cause is because He had no beginning." 
For more on the "Who Made God?" question, see here and here.
Courage and Godspeed,
1. Frank Turek, Stealing from God, p. 22.