Develop tunes following the predetermined chord changes.
'C', 'G7', 'C', 'G7', 'C', 'F', 'C', 'G7', 'C', 'F', 'C', 'G7', 'C'  
X:1
L:1/8
M:2/4
K:C
"C" GA/G/ EG |"G7" DG Bd | GA/G/ FG |"C" EG ce | GA/G/ EG |"G7" DG Bd | GB/d/ fB |"C" cc/B/ c z :: 
"F" AA A/c/B/A/ |"C" AG G2 |"G7" B/G/F/G/ d/G/F/G/ |"C" c/G/E/G/ c2 |"F" AA A/c/B/A/ |"C" AG G2 | 
"G7" B/G/F/G/ dB |"C" ce c z :|  