In 1990 what litter grafitti was seen here consisted of “OF” where the O had a happy face. This stood for Obcanska Forum. Their supporters, not having the cash for billboards perhaps, spray painted the initials around town. Soon though the street artists began transforming walls into blotters, writing, drawing, or simply defacing public and private property all over the country. To do this, you can use markers but most prefer spray cans. Therefore, they are called sprejeři, or sprayers. When a dog urinates to mark his territory, he can also be called a sprayer. Is there a difference between dogs spraying on walls and teenage boys doing the same? Well, at least the dogs don’t play music while doing it.