Craft a musical composition that adheres to the specified musical theme and letter-based structure.
X:1
L:1/8
M:3/4
K:Amin
['[ec][ec] [ec]2 Bc/d/ c2 Bc/B/ A2 AA', 'B2 BA/B/ cA ee cc EE']  
X:1
L:1/8
M:3/4
K:Amin
 [ec][ec] [ec]2 Bc/d/ | c2 Bc/B/ A2 | AA EE E^F/^G/ | A2 E/D/C/B,/ A,2 | [ec][ec] [ec]2 Bc/d/ | 
 c2 Bc/B/ A2 | AA EE E^F/^G/ | ^G G [EA,]4 :: B2 BA/B/ cA | ee cc EE | B2 BA/B/ cA | ee cc EE | 
 E/A/^G/A/ Bd cB/A/ | c/B/A/^G/ A2 A,2 :|  