Construct a melodic piece using the designated alphabetic pattern and the provided musical theme.
X:1
L:1/8
M:2/2
K:A
['A2 Bc']  
X:1
L:1/8
M:2/2
K:A
 ed |"A" c3 B A2 a2 |"D" f=gaf dfed |"A" cdec"F#m" A2 Bc |"Bm" d B2 B"E7" B2 ed | 
"A" c2 (3BcB A2 a2 |"D" f=gaf dfed |"A" cdec"F#m" A2 Bc |"E7" dBGB"A" A2 :: Bc |"D" d3 e f2 ed | 
"A" ccAc e2 A2 |"E7" BABc dBcB |"A" AEAB"A7" cBAc |"D" d3 e f2 ed |"A" ccAc e2 A2 |"E7" BABc dBcB | 
"A" Aaec A2 :|  