Compose a piece of music following the specified structure and theme.
X:1
L:1/8
Q:1/4=110
M:2/4
K:G
['BB BA/G/', 'dBB B/c/ dBgB dB Bc/d/ dBgB aA'  
X:1
L:1/8
Q:1/4=110
M:2/4
K:G
 G/A/ | BB BA/G/ | BB Bg/e/ | dB BA/G/ | FA AG/A/ | BB BA/G/ | AB gf/g/ | .b/.a/.g/.f/ .a/g/.f/e/ | 
 dBB :: B/c/ | dBgB | dB Bc/d/ | dBgB | aA AG/A/ | BB BA/G/ | AB gf/g/ | .b/.a/.g/.f/ e/f/g/e/ | 
 dBB :|  