This is the image you will see when you click play button.
[img]http://www.phy.ntnu.edu.tw/ntnujava/snapshotejs/wavep_2_20070302001933.gif[/img]

Later you will see something like the following:
[img]http://www.phy.ntnu.edu.tw/ntnujava/snapshotejs/wavep_2_20070302002135.gif[/img]

Because there is a delay of spring response in the right direction, and the time delay is proportional to the distance
(The ratio of distance/time = wave speed). What we see is a wave motion.
When there is a time delay with resprect to spatial separation, that is [b]wave[/b].