thank to BBBob for his original file, this is a non OP version to be able to have a bit more flexibility when jamming.
I just cut it, leaving his setting as they are. So you have them here
intro (long count in, 1, 2, 1234 1234 Which gives room for the guitar intro)
main A 12 bars
second main section 12 bars with fills at the beginning
outro: two times the 4 last blues bars
the second alternative version is with fills section as fill and 4 bars ending.