Compose a piece of music that follows both the given musical theme and the letter-based structure provided.
X:1
L:1/8
M:2/2
K:Amin
['EGGc A/A/A', 'aAA g e/f/g ce ecge BGdG Bcdf']  
X:1
L:1/8
M:2/2
K:Amin
 B/c/ | A/A/A AG EGGc | A/A/A AB cded | cBcG EGGc | A/A/A e^g aAA :| g | e/f/g ce ecge | 
 BGdG Bcdf | ecgc egca | gede cAAg | agea gced | cAGc EcGc | AcGA cdea | gede cAA ||  