This is a meditation prayer that many Gnostics use:
The Dome of Light:
Picture a magnificent dome, its perfect rounded walls and ceiling made of the radiant white light of the Holy Spirit, with you and those you love inside it, safe, warm and basking in God’s love, protected from all darkness and negativity.
"All day and all night, throughout your life, may you and the other white entities of this world find each other and walk together safe and unharmed through the negativity of the Dark Side as you make your way Home."
I know a nice ritual but have to look it up. it involves sptinkling salt around the outside of the house and a wghite candle. Very simple. I will dearch and post asap (it's in a book I have!)