Compose melodious music utilizing the prescribed letter representation and integrating the given thematic element.
X:1
L:1/8
M:4/4
K:G
['GDGB dBdB', 'gdBd GdBd']  
X:1
L:1/8
M:4/4
K:G
 BA | GDGB dBdB |{B} c2 ce dBAG | c2 ec B2 dB | A2 A2 A2 (BA) | GDGB dBdB | cece dcAG | efge dcBA | 
 G2 G2 G2 || (d/e/f) | gdBd GdBd | gdBd GdBd | cece BdBd | A2 A2 A2 BA | GDGB dBdB | cece dBAG | 
 efge dcBA | G2 G2 G2 ||  