Compose a musical piece with harmony using the indicated chord pattern.
'G', 'G', 'D7', 'G', 'Am', 'D7', 'G', 'G', 'D7', 'G', 'Am', 'D7'  
X:1
L:1/8
Q:3/8=120
M:9/8
K:G
|:"^A""G" d2 c BGB BGB |"G" d2 c BGB"D7" cBA |"G" d2 c BGB BGB |"Am" cBc A2 B"D7" cBA :: 
"^B""G" GBd gdB gdB |"G" GBd gdB"D7" cBA |"G" GBd gdB gdB |"Am" cBc A2 B"D7" cBA :|  