No smoking signs

It's only recently that i noticed the huge variety of no smoking signs !
Since the message was conveyed quickly from the sign, i didn't stop to look at each detail : the form of the cigarette,its position and direction, the representation of flames...


So, even if the cigarette is represented by a simple rectangle, hollow or filed, red or black, thin or thick, a cylinder pointed to the left or the right, the flames being represented through two lines or three or even in curves, even if the red circles isn't always used, the message is always there.