The rainbow flag was designed in 1978 for a gay parade in San Francisco and over the last 30 years it has become the global symbol for gay pride. If the flag were designed in 2009, how would it look? Mark Randall of the design firm Worldstudio accepted the challenge, and he and his team came up with several ideas for a 21st-century pride flag makeover. 

Slideshow: Some of Worldstudio's new flags