a MooTools script problem

[DWebDev]

Can anyone tell me how I can get this one script to just
do transitions with the Alpha transition. I am not quite catching on
to the mootools documentation yet.
Something's missing I think.. i might have to learn it from some other
major starting points about its syntax and rules.
Here's the script that works now on this site but I want it to do a
transition alpha gradual fade in and out type of thing:
new viewer($$('#box1 img)')).play(true);

And all its doing is playing the images randomly, slides in, slides up
left right just random. I don't want that.
Does .play method just force it to play random? First i DO want it to
play automatically on load of this homepage of this website But I
don't like the transitions. This script is perfec tthough because it
pulls just from a folder jpegs for the client to update himself.

Paul-