Construct a melodic piece using the designated alphabetic pattern and the provided musical theme.
X:1
L:1/8
M:4/4
K:A
['B2 B2']  
X:1
L:1/8
M:4/4
K:A
 E2 | A3 A G2 A2 | B3 c B2 B2 | c2 c2 ^d3 d | e4 z2 E2 | E3 E F2 E2 | c3 B A2 A2 | B2 B2 d3 d | 
 c4 c2 c2 | B2 f2 e3 G | A6 |]  