Counter Node and Get Slice - Using the two to make a fade effect?

Hi everyone, I’m having trouble making a fade effect with a linear spread. I have a GetSlice node and a Counter to access the slices I want to shrink to a width and height of zero to make them “disappear”, however when the Counter continues counting up the GetSlice node will will move onto the next slice and the original slice will go back to its original size! Is there anyway to have it so that once the Counter counts past that slice, it will retain its “shrunken” size? I feel there should be a simple solution but I can’t think of ways how to accomplish this. If anyone has the answer that’d be great!

This is what I have at the moment: