swirl hypnotize spirals. stair whirl hypnotism, spiral hypnotic

action artistic background black circle circular concentric curve design effect geometric graphic helix hypnosis hypnotherapy hypnotic hypnotism hypnotize illusion illustration line monochrome motion move optical pattern psychedelic radial rotating rotation round shape spin spiral stair step stepping stripe swirl swirling twirl twist vector vertigo volute vortex way whirl whirlpool white