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