Craft a piece of music that integrates both the suggested theme and letter-based structure.
X:1
L:1/8
M:2/2
K:G
['B/c/ dBdB gfge dBdB', 'abaf d2 dc Bcde d2']  
X:1
L:1/8
M:2/2
K:G
 B/c/ | dBdB gfge | dBdB G2 Bc | dBdB edcB | B2 A2 A3 B/c/ | dBdB gfge | dBdB G3 B/c/ | dgfg ecAF | 
 G2 G2 G3 :: f/g/ | abaf d2 dc | Bcde d2 fg | abaf d2 dc | Bcde d2 g2 | dB g2 dB g2 | 
 dBdB G3 B/c/ | dgfg ecAF | G2 G2 G3 :|  