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Mixed
Flat
The shine of small things
time, Alarm, Alert
Black
512x512
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Office Vol.2
Loud, Alert, megafon
MediumTurquoise
Office Vol.3
Clock, watch, Wait
DimGray
speaker, Broadcast, Alert
watch, time, Alert
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Things
gold, bell, church
Goldenrod
Krispicons- Modern Flat Icons Freebie
timer, Horn, Alert
Purple
111x111
Attention, danger, Caution
Firebrick
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Fire
fire, Alert, warning
Crimson
ForAll
warining, Alert, Error
LightSeaGreen