That is surprisingly harder than it seems, at least it was for me when I attempted it about 8 months ago. Eventually I gave up and simply did increments
so the output was
1,2,3,4,5 >>> Next
<<< Prev 6,7,8,9,10 Next>>>>
<<< Prev 11,12,13,14,15 Next >>>
Because my original plan of having it display x percent of the results with x percent fade off would basically result in me only getting half of it to work at once.
Not to discourage you, but in case you bang your head with this for a while, consider the alternative