There is only one logical solution to this. The technique to solve the last eight pixels is sometimes called the "mustache" method, or the "smile"? It's... hard to articulate when you can use it. It's... more of a theorem than a postulate, if you're familiar with Geometry, but... Basically, if you split that 4x4 box into a 2x4, it's just the same thing mirrored. You'll start to see this all over the place. And occasionally variations on it, where the "tips" of the "smile" aren't actually connected with the body of it, but somewhere a couple rows above or below. Good luck! 8D.