Go outside and collect pebbles from anywhere you feel like such as a Mountain, a Stream, a Beach, or many different places.

Then take them home and find an Earthenware Pot
or some other natural material container and place it in front of you.

 Cast a Circle- if you wish
and then take the first stone,

Say:
"Little stone, oh so small, that comes from.... (place you got it) Protect this house with your power,
and turn away darkness at all hours"

Envisage a large bubble of White Light that deflects negativity emanating from the stone and then place it in the pot.

 Repeat with the rest of the stones and then finally place the
pot in the place you feel it belongs.