Pick by comparison advanced

I recently made a topic called "pick by comparison" and the answer worked perfect but, I noticed a way to cheat in my game so by fixing this I must tweak this script a little but I don't know how to it. So my script is this:

event:

for each (ordered)

ice.y

ascending

action:

ice start fade

stop loop

so that's what I have so far but how would I make it so it makes the ice that doesn't have any ice above it dissapear and not just the ones at the top.

Descending instead of ascending?

If that's not it, can you explain in more detail what you want to do?

well in my game I have it so the player is on an island of ice and the ice melts away but i only want the ice that is on top to melt away and not the ice in the middle

Middle = higher y than other ice blocks and lower y than some others, yes? I don't think it would melt away by a function like this.

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This is might be what you are trying to accomplish:

Break_Block