changing the colum color in a loop

i want to change the color or colum ... i have PHP code and MYSQL qury that display records from the database.. i want to make it easier for the visiter and have two color in the table.. for example.. the first color i light gry and the second color is white.. therefor,, the color chages in the loop.. the loop create the table... what i want is to change the color only... ## Deliverables this is the file with the code i have.. just do the color...