Develop a musical piece incorporating the designated alphabet-based pattern and the supplied melodic theme.
X:1
L:1/8
M:3/4
K:D
['Fd f2 f2 f4 dF Cc e2', 'Fd f2 f2 f4 dc']  
X:1
L:1/8
M:3/4
K:D
 Fd f2 f2 | f4 dF | Cc e2 e2 | e4 GE | F2 de f2 | C2 cd e2 | df e2 d2 |{d} c6 :: CE c2 c2 | c4 EC | 
 FA d2 d2 | d2 cd F2 | C2 e2 d2 | c4 z2 |"^1)" Fd f2 f2 | f4 dc |"^1)" Fd f2 f2 | f4 dc | cedAFE | 
 F6 :|  