Write a program that takes in a positive integer N.

When N is 1, output

    /\
    \/

When N is 2, output

    /\/\
    \/ /
    / /
    \/

When N is 3, output

    /\/\/\
    \/ / /
    / / /
    \/ /
    / /
    \/

When N is 4, output

    /\/\/\/\
    \/ / / /
    / / / /
    \/ / /
    / / /
    \/ /
    / /
    \/

For larger N the pattern continues, a new layer is added every time N is incremented.

- "Output" means print the slash pattern or return it as a string.
- A single trailing newline in the output is allowed.
- Trailing spaces in the output are allowed but leading spaces are not.

**The shortest code in bytes wins.**