alarm
alert
area
attention
background
banner
black
blank
bomb
border
burst
caution
comic
concept
construction
crime
danger
design
empty
font
frame
hazard
illustration
label
line
order
perimeter
police
poster
restricted
retro
ribbon
road
safety
scene
security
sign
stop
street
strip
stripe
striped
tape
template
texture
warning
yellow
zone