Passage of Time EP6

I had an idea for this week's Experimental Photography challenge, but had no idea where I would find a suitable subject for it.  However, I was passing through Musselburgh and spotted the perfect thing.  It did take me time to construct this properly - this one was my third go, and the intervals between shots became progressively shorter as my patience ran out! I had to do it handheld; would have been better if I had had my tripod.