12 bar blues

'half bend  
''full bend  

This is played in most blues songs  

Riff1  3,4,-3',3  

Riff2  4,4,-3,4  

Riff3  3,-3',4,-4''  

This is the order its played in   

Riff1 *4  
Riff2 *2  
Riff1 *2  
Riff3 *1  
Riff2 *1  
Riff1 *2  
Repeat