If you are not familiar with TimeLapse , than you should know that Time-lapse photography is a cinematography technique whereby each film frame is captured at a rate much slower than it will be played back. When replayed at normal speed, time appears to be moving faster and thus lapsing. Time-lapse photography can be considered to be the opposite of high speed photography.
Processes that would normally appear subtle to the human eye, such as the motion of the sun and stars in the sky, become very pronounced. Time-lapse is the extreme version of the cinematography technique of undercranking, and can be confused with stop motion animation.
This can also be done with iPhone ( 1st gen and 3G as well ) , and its an extremely simple process:
You can also tweak it up and spend some time to make it look good. This is the final product, the way it should look :
