Make a four-room dungeon.

Gotta try out all of those directions!

Map:

/---------------------------------\
|               |                 |
|               |                 |
|               -                 |
|                                 |
|                                 |
|               -                 |
|               |                 |
|0              |1                |
|-----|    |----+------|    |-----|
|               |                 |
|               |                 |
|               |                 |
|               |                 |
|               |                 |
|               |                 |
|               |                 |
|2              |3                |
\---------------+------|    |-----|
                |                 |
                |                 |
                |                 |
                |      Exit       |
                |                 |
                |                 |
                |                 |
                |4                |
                +-----------------/