Construct a melodic piece using the designated alphabetic pattern and the provided musical theme.
X:1
L:1/8
M:3/4
K:Amin
['A/B/c/d/ e2 e2 ab ^g2 (^fe) a>b', 'e4 e>e fg fe d>d ef ed']  
X:1
L:1/8
M:3/4
K:Amin
 A/B/c/d/ e2 e2 | ab ^g2 (^fe) | a>b e>^f =ga | ^f>e e4 :: e>e fg fe | d>d ef ed | c>c de dc | 
 B>A A4 :|  