Pentagram

Compass

 Rosemary

 Lavender

 Snap lock bag

Glue the Pentagram to the compass, "Spirit" point North.

 Place everything into bag, bury in center of building or middle of door. Pentagram pointing North. Cast a Circle. 

Chant the spell;

"Goddess and God bless this house,
Keep it free from bug or mouse.
For good or bad, dark or light,
Those unwelcome will feel thy might.
Protect me as I do thy will,
here you are master for good or ill
Goddess and God hear my prayer"

So Mote it Be.

Concentrate on the Spell until you feel the power flowing, Then break the circle and finish.