Out of the blue, the fleas

Out of the blue
The fleas.
As they were painted,
Centuries ago,
on a canvas of letters.
They had passed
between the lovers,
Today they jumped over keys.

I felt them hop two-by-two
between oft-repeated names.
I watched them stride,
into the lonely night.
When the stars were dim,
out of the blue,
the fleas
two-by-two.