The blink program used to be (and still is) a separate program.
However the latest bootloader program has a blink function included.
If your Uno or Nano has a blink, but nothing else, it's likely that
it has just the bootloader in it. You need to upload the Raduino
program.
If I suspect a problem, first I modify to blink program
to about 2 sec on/off and upload that. That provides a check
that everything is working and then I can upload the main program.
john
AD5YE
