Huh? What is F2 D' R2 D' L' U' L' R B D' U B L F2 L U2 ??

It's the algorithm for this pattern.

Pretty, isn't it?

Have a look at this site for an explanation of the notation.

For those of you who are not cubers, I should point out that this algorithm needs to be applied to a solved cube to get this pretty pattern. If you want to learn to solve the cube, check out my beginner cube solution.