Compose a musical piece using the designated musical pattern's alphabetic representation and the assigned melodic theme.
X:1
L:1/8
M:6/8
K:Bb
['d2 c']  
X:1
L:1/8
M:6/8
K:Bb
 F | B2 B B2 c | d2 d d2 c | d2 d d2 c | Bcd c3 | def g2 f | dcB f2 d | B2 c dfe | d2 c B2 ||  