Changing alignments (a tsunami effect)

hi got this file from a tutorial. it is a tsunami effect. i have played with the left and right alignments in the code but it wont let me align to the right instead of the left. if any body knows how it can be changed to allow it to work from the right hand side of the surrounding area?

thanks to the great efforts put in by all who use their own time to write tutorials. :toad:

U mean like this?