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
['(Bd)dg (ed)eg', '(G/A/B/c/) dB']  
X:1
L:1/8
M:2/2
K:G
 (Bd)dg (ed)eg | (de)Bd (gd)eg | (Bd)dg (ed)eg | (de)Bg (A2 G2) :: (G/A/B/c/d/) dB GBgB | 
 (G/A/B/c/) dB gBAB | (G/A/B/c/) dB gdec | BGAB G/G/G G2 :|  