Spirits drew grugs on the obvious fields. Look at the picture. It looks like symbols of a school of magic from some game, or symbols of the most ruthless knowledge. Esotericism and occult practices, at their core, actually lead to contact with spirits, no matter what their blind adherents say. And demons are known for offering knowledge to seduce.

Currently, there is a strong barrier between the spiritual world and ours (thanks to the resurrection of Christ), which forbids demons from openly performing tricks in our world. Therefore, this is simply one of their faceless ways to send a signal and attract the attention of a particular individual.

It is precisely because of this barrier that humanity subconsciously taboos this topic.

But in the near future, toward the end of world history, this barrier will be temporarily removed, and humanity will globally recognize the reality of the occult world. Esotericism and occultism will become widespread, just as religions are now widespread. This will become a scientific phenomenon. In the subconscious of the masses, this is reflected in endless films about alien invasions of our Earth, first contact, and so on. The most widespread idea is that the circles are supposedly left by aliens.

If you want to verify this, dig into the testimonies of (((contactees))). You'll find that they often claim that aliens are "higher, benevolent beings, at a higher level of development, observing us," yet for some reason "are prohibited from directly interfering in our Earthly affairs."