Develop tunes following the predetermined chord changes.
'G', 'D7', 'G', 'G', 'D7', 'G', 'G', 'D7', 'G'  
X:1
L:1/16
M:2/4
K:G
 B |"G" dega bgba | gbag efge | dega bgba | gbag e2<g2 | [dg]2ga bgba | gbag efga | gedB AGEG | 
"D7" DEGB"G" AEG :: A |"G" BAGB AGEG | DEGA Bded | B/GB AGEG |"D7" DEGB"G" AEGA |"G" BAGB AGEG | 
 DEGA Bdef | gedB AGEG |"D7" DEGB"G" AEG :|  