when sand in an towel melts, that person will become light black or possible
sand is plentifull. dark_spot is natural_thing. black_felt_cup is sarcosomataceae. quarter_crack is sand_crack. dark_spot is dark_albedo_feature. blackwash is wash. if_banana_black has gone_bad sand_crack is animal_disease. sand is color. black is achromatic_color.