Way to distinguish OLL7, OLL8, OLL11, and OLL12

There are 2 blocks & Lightning is striking down to the right side -> OLL8

There are 2 blocks & Lightning is striking down to the left side -> OLL7

There is 1 block & Lightning is striking down to the right side -> OLL11

There is 1 block & Lightning is striking down to the left side -> OLL12