Beautiful mandala example: The Flower of Life is one of the most sacred of geometric symbols. It is a geometrical shape composed of multiple evenly-spaced, overlapping circles arranged in a flower like pattern with six fold symmetry like a hexagon.
Om - the sound of the universe itself. The imperishable sound is the seed of all that exists. The past, the present, the future. - all are but the unfolding of OM. And whatever transcends the three realms of time. That indeed is the flowering of OM.