abstract
annular
art
background
blue
circular
colored
concept
creative
deceptive
delusion
effect
fallacy
fancy
fantasy
geometric
graphic
hole
hypnotic
illusion
illustration
imagination
motion
motley
movement
moving
object
optical
ornament
patterned
phantasmagoria
pit
rolling
rotating
rotation
space
spin
squares
surreal
tornado
torus
trick
typhoon
visual
visually
vortex
whirl
whirlpool
yellow