Make a top ten list based on a subject matter of your choosing and represent those things in the form of a piece of pixel art. Just make sure it's clear what your list is, what items are in your list and what order they are in (everything should have a number between 1 and 10). You can add these details in your description if you like.
The way you present your top ten is up to you; so you could scatter your top ten around a large canvas or maybe animate it in the form of a countdown. Just keep in mind that even though the canvas size and colour count are unrestricted, you needn't go overboard.
A few possible ideas to get you started:
Your list may now include a minimum of 3 items and a maximum of 10.
Canvas size - Unrestricted
Colours - Unrestricted.
Transparency - Optional.
Animation - Optional.
The challenge thread will have all the challenge updates. The thread is also a great place to post your WIPs.