Develop a musical piece that combines the given theme and letter-structured outline.
X:1
L:1/8
M:9/8
K:G
['G3 BGB', 'B/c/BA BGE']  
X:1
L:1/8
M:9/8
K:G
 G3 BdB cBA | G3 BGB AFD | G3 BGB ABc | dcB ABG FED :| B/c/BA BGE E3 | B/c/BA BGE FGA | 
 B/c/BA BGF EFG | A3 ABG FED :|  