Twinkling shadows

A pretty uneventful day, spent at the townhouse, interrupted by the late afternoon STEP class.

Spotted this pattern on the patio, when I was walking the fitbit on the fitness flyer.  Couldn't for the life of me, figure out what was making the pattern.

NOTE :  Today my Daddy would have celebrated his 91st birthday.  He's been gone for years, but I still miss him.