a meditation

there is a meditation/visualization that goes: "when feelings of peril, distress or need for retreat and silence, for protection and guard, imaging standing on the base of a square it can be 1x1 or 1000x1000 you can protect yourself, or all your family bundled up, or all your house, you can be still or walking, or running. When you have hold of the square beneath your feet, imagine lines go up from the corners and form a triangle above your head. hold everything within the pyramid. Visualize all light within, all protected and safe. Outside there are other, but that is There and This is here.