Shadow

i walk behind you i dance at your feet i copy your ever move i disappear in the shadows never to be found cant see me can't catch me i disappear at night I'm shadow that walks with you all day i run across the sidewalk running on walls and standing on ceilings i make shapes in the distance i mock you as you walk I'm your shadow scaring you at night when i make a scary figure i stand tall in the sunlight and blend with the shadows can't see me can't catch me who am i? I'm your shadow