hexagon 19 flower of life standing wave

These look like Tibeten Monk Mandalas. How could they have known or seen these shapes thousands of years before electronic technologies were able to create and capture the effects of sound resonance? This blows me away. I'm thinking there are probably art forms, or ancient techniques that have been lost to time. Maybe they have been hidden because of the powerful nature they possess. Having the ability to manipulate matter, destroy it, create it. That does sound dangerous.