We’ve been doing some great explorations of the roots of rock and roll which began with the basic form of the 12 bar blues. These 12 measures are like a pattern, a recipe that hundreds if not thousands or hundreds of thousands of songs have been based. Once you know the “recipe” you can cook up your own or play all of the variations. Here’s a few of them.
You can view these video clips and read along in the music notation I gave you.