abstract

animated

animation

art

attention

background

black

caution

circle

concentric

danger

design

escher

geometric

geometry

graphic

hazard

hole

hypnosis

hypnotic

illusion

infinity

line

lines

loop

looping

magic

modern

moving

optical

pattern

perspective

psychedelic

round

safety

seamless

security

shape

spiral

stripe

swirl

texture

tunnel

visual

wall

warning

wave

whirlpool

yellow