Age old questions

The sun creates both sunlight 
And shadow each an inverse 
Of the other. It's shadows that
Seem the stronger one, written
On the granite face of the walk.
Elusive markings dependent on
Time of day position of the sun
Where they fall they also lead as
If they were breadcrumbs in a
Tale of Hansel or Gretel in their
Escape from a witch who only
Wants to fatten them, her cook
Pot awaiting the moment; they
Awaiting the run-for-it that sets
Them free. Shadows in a forest,
Following the crumbs that birds
Have messed on the way home.
Out of the shadows into the light.