Develop a musical piece that combines the given theme and letter-structured outline.
X:1
L:1/8
M:9/8
K:G
['BAG AGE GED E/F/GD', 'Bdd edd BAG']  
X:1
L:1/8
M:9/8
K:G
 BAG AGE GED | E/F/GD DEG A2 c | BAG AGE GED | E/F/GD DEF G3 :: Bdd edd BAG | Bdd edB A3 | 
 Bdd edd BAG | GED DEF G3 :|  