Patterns on a shed roof.

The rising sun shining between the corner of our house and next door made a wedge on our shed roof.  The leading edge is where the frost is still melting, the wedge behind where the frost has melted and is still in the sun, and the dark wedge behind was the first to be melted and is now in shadow.  The rest of course is the light frost.
 
 
After that pleasant start to the day things have been a bit mundane.  A few small jobs done, and an on line social meeting tonight.