Construct a melodic piece using the designated alphabetic pattern and the provided musical theme.
X:1
L:1/8
M:6/8
K:D
['B A2 A']  
X:1
L:1/8
M:6/8
K:D
 A, |"D" DDD FFF |"A7" (ED)E"D" D3 |"D" (A3- A2 F) |"G" B A2-"D" A2 A |"G" BdB"D" AGF | 
"A7" GAG"Bm" FDE |"D" F>GF"A7" (ED)E |"D" D3 D2 E |"D" F3"A7" (ED)E |"D" D6 |"D" A3- A2 F | 
"G" B A2-"D" A2 A |"G" (Bd)B"D" (AG)F |"A7" GAG"Bm" FDE |"D" F>GF"A7" (ED)E |"D" D3- D2 |]  