Create compositions based on the given chord modifications.
'C', 'G7', 'C', 'G', 'D7', 'G', 'G7', 'C', 'G7', 'C', 'G7', 'C', 'F', 'C', 'G7', 'C'  
X:1
L:1/4
M:3/4
K:C
"C" c3 | E2 F | G3/2 A/ G | E2 z |"G7" d3/2 e/ d | B2 z |"C" c d f | e2 z | c3 | E2 F | G3/2 A/ G | 
 E2 z |"G" d3/2 e/ d | g B2 |"D7" d c A |"G" G z z ::"G7" G z F | d z B |"C" c3 | e f ^c |"G7" d3 | 
 d e B |"C" c2 z | d c A |"G7" G z F | d z B |"C" c3 |"F" A3/2 f/ f |"C" G3/2 e/ e |"G7" g z B | 
"C" c2 z :|  