Construct a melodic piece using the designated alphabetic pattern and the provided musical theme.
X:1
L:1/8
Q:1/4=90
M:6/8
K:Bb
['A B3/2 c/ d (c3 c3)']  
X:1
L:1/8
Q:1/4=90
M:6/8
K:Bb
 d3/2 c/ B F3/2 G/ F | d3/2 c/ B F3 | F3/2 G/ A B3/2 c/ d | (c3 c3) | e3/2 d/ c G3/2 _A/ G | 
 e3/2 d/ c G3 | c c B A A G | (F3 F3) |"^Chorus" F2 B (AB) c | B3 F3 | (FG) A B3/2 c/ d | (c3 c3) | 
 d2 c (=Bd) f | (e2 d) c3 | d2 B d2 B | (d3 d3) | (ed) c (FB) A | (B3 B3) |]  