Flash fiction is short fiction. There is no widely accepted definition of the length of a flash fiction piece. Some have described flash fiction from as little as 300, as long as 1000 words.
more information for flash fiction can be found on the flash fiction wiki: http://en.wikipedia.org/wiki/Flash_fiction
assignment: write a flash fiction story of 500-1000 words in length.
your theme or inspiration for the assignment is: elements (earth, air, fire, water, ether)