Compose a melody with the specified chord progression.
'G', 'C', 'D7', 'G', 'Am', 'D7', 'G', 'G', 'G', 'G', 'Am', 'D7', 'G'  
X:1
L:1/8
M:4/4
K:G
|:"G" GABc dedB |"C" cBAG"D7" ADDC |"G" B,CDE"Am" cBAG |"D7" BdAF"G" G2 [GG,]2 ::"G" DCB,C D2 G2 | 
"G" DCB,C D2 G2 |"G" dedB"Am" cBAG |"D7" BdAF"G" G2 [GG,]2 :|  