Craft a piece of music that integrates both the suggested theme and letter-based structure.
X:1
L:1/8
Q:3/8=120
M:6/8
K:G
['d gfg dgf', 'd2 d dBd =f2 e dcB c3']  
X:1
L:1/8
Q:3/8=120
M:6/8
K:G
|: d | gfg dgf | gdB G2 B | cdB A2 G | FGE D2 d | gfg dgf | geg f2 d | ^cde Ad^c | d3- d2 :: d | 
 dBd =f2 e | dcB c3 | cAc e2 d | cBA B3 | GBd ecA | dBG Bdg | Aag fef | g3- g2 :|  