Sand, wind and water

I never really tire of sand and the ever changing patterns created by wind and water. The strong winds of the last couple of days have performed their magic again on the great mobile dune at the mouth of the river Ythan.

Mock on, mock on,Voltaire Rousseau; Mock on, mock on,'tis all in vain! You throw the sand against the wind, And the wind blows it back again.

William Blake