Develop a musical piece using the given theme and incorporating the letter-based structure provided.
X:1
L:1/8
M:6/8
K:Emin
['', 'Eee e2 g', 'G ABd']  
X:1
L:1/8
M:6/8
K:Emin
 D |: Eee e2 g | deg dBG | Eee efg | dBG A2 E | Eee e2 g | deg dBG | Eee e2 g | dBG A2 G || 
 ABd A2 G | ABd G2 G | ABd e2 g | dBG A2 G | ABd A2 G | ABd G2 G | ABd e2 g | dBG A2 G ||  