You only need to learn one algorithm and its mirror for the second layer

This blue edge cubie (yes it is called a cubie) in the last layer is the **blue**/**red** edge cubie.

In this picture, **U=white, L=red and F=blue**.

Now, position the**blue**/**red** edge piece so that the color on the side of the cube (**blue**) lines up with it's center.

Now do the following algorithm:

**D L D' L' D' F' D F**

If the **blue**/**red** edge piece was flipped the other way so that the **blue** was on the bottom instead of the **red**, you would position the cubie under the **red** and use the following algorithm:

D' F' D F D L D' L'.

This is the mirror of the previous algorithm.

Now, position the

Now do the following algorithm:

D' F' D F D L D' L'

This is the mirror of the previous algorithm.