I was down the beach hoping for some good sunset pictures – the clouds had other ideas.  The tide was going out and nearly at the low point.  The small ripples of the incoming waves and the receding tide gave some interesting interference patters – but it was getting dark.  Fortunately the Pentax K-5 has a built in flash – so flipped it up and snapped this shot.  Capturing an even more interesting pattern as the light from the flash reflected off the colourful pebbles.