Problem with making a grayscale using photo paper and an enlarger?

i tried to make a grayscale on a piece of cardboard by covering all but a portion of the photo paper and setting it under the enlarger light for 1 second, and then moving the cardboard to let a bit paper more be visible, repeating the process a bunch of times so i should have ended up with a paper in decreasing... show more i tried to make a grayscale on a piece of cardboard by covering all but a portion of the photo paper and setting it under the enlarger light for 1 second, and then moving the cardboard to let a bit paper more be visible, repeating the process a bunch of times so i should have ended up with a paper in decreasing shades of black with the last portion being white. however, when i put my photo in the developer the entire thing was black, what did i do wrong?
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