...when I'm going through an inspiration 'desert'. I start reprising old tunes, and generally faffing about all over the place.
... I was doing the faffing thing with a quiet chord progression loping in the background and just playing any old thing on the guitar... only something happened...my fingers got too sore and I had to stop, but here is just a snippet...
The genesis of a song. Congratulations! (it is always fascinating to observe the creative process in action)