I would like to make this panel slide from left to write and each icon (app) slide up and down !!

I would like to make this panel slide from left to write and each icon (app) slide up and down !!
How can I achieve this..
Who can point me in the right directions please
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Slide the apps independently?
It can be a bit unmanageable, but you can place 1×1 panels inside the main 5×1 panel. Then place the apps inside those small panels, one of each. Set the scrolling direction vertical and horizontal respectively and it should work.
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I don’t understand :/
Z-index? Why? The icons don’t overlap.
Perhaps I misunderstand the original post.
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Sorry I missed the notification. What I understood is that he slides up/down on icons other icons appears (ie : slide on contacts leads to phone app then messages app etc.). So playing with Z-index on icons could make them “appear”.
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