Flight of fancy - with marbles

I've bought myself some marbles, in case I lose a few.
At rising fifty-nine it seemed the wisest thing to do.
You never know the hour or the minute you might flip.
Besides, on rainy days, it gives me something new to blip.

(And another chance to play with Photoshop! I'm hoping the background looks like a sweeping desert ...)

Am I losing my marbles?
Oh, I think we all know the answer to that!