The formation of a pentagram didn't happen suddenly. The process itself didn't take long, lasting from a few minutes to an hour.
But the phenomena associated with the formation of a pentagram appeared gradually, first with less intense signs, and only toward the end of its formation with more striking signs.
The formation of pentagrams was also progressive. A cyan pentagram would not form suddenly. It would first appear as a gray essence, and over the course of the formation it would change color; first to red, then to orange, then to yellow, until it reached its last quality.
When Vicente felt the supernatural sensation of the formation of the pentagram, he didn't see it appear, nor did any phenomena appear powerful enough to disturb this sizeable area.
He and the others could tell that a pentagram was forming, but for the moment, only those closest to it would notice it.