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in the 1960s and 1970s, was graffiti done on Subway cars.
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From 1971 to 1974, writers started using spray cans and making throw ups.
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In 1972, the mayor of New York City declared war on graffiti.
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In the late 70s, murals began to appear around the city.
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The years 1980 to 1985 stands out as a particularly tough time for writers.
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Writers organized in crews, and by the summer of 1980, competition between crews had reached fever pitch.