pixel_at(499,393).should_be_of_color 0xffffff
pixel_at(525,381).should_be_of_color 0xffffff
pixel_at(545,376).should_be_of_color 0xffffff
pixel_at(499,393).should_be_of_color 0xffffff
pixel_at(525,381).should_be_of_color 0xffffff
pixel_at(545,376).should_be_of_color 0xffffff