Compose a musical piece based on the specified chord sequence.
'G', 'Am', 'Am', 'Am'  
X:1
L:1/8
Q:1/4=120
M:2/4
K:Amin
"G" cc/d/ BA/B/ | GG/A/ B/c/d/B/ | cc/A/ BG |1"Am" AA A/e/A/B/ :|2"Am" AA A/e/A |:"Am" ec d/e/d | 
 cc/A/ B/c/d/B/ | cc/A/ BG |1 AA A/e/A :|2 AA A/c/B/A/ |: GGcc | B>A GG/A/ | BG cB |1 
 AA A/c/B/A/ :|  