side by solving all edges of a given color. Align the edges with the second-layer centers. ! 2. F2L (First Two Layers) Fill in the four slots between the cross pieces, one slot at a time. Each slot is filled by inserting a corner and its corresponding edge. ! 3. OLL (Orientation of the Last Layer) Make the entire top side (the last layer) of the cube a solid color. ! 4. PLL (Permutation of the Last Layer) Finally, you finish the cube by permuting the top layer of the cube.