Compose a piece using the specified musical pattern based on the alphabet and the provided melodic theme.
X:1
L:1/4
M:9/4
K:C
['d c', 'f e']  
X:1
L:1/4
M:9/4
K:C
 c3 g2 f e d c | a g a A B c B3 | c3 (TB2 A) G F E | D d c B G B c3 :| c3 c2 _B A G F | 
 d3 d2 c B A G | e d c f e d/ d g f e | a g f e a c B3 | c3{c} B2 A G F E | A3{A} G2 F E D C | 
 A d c B e d c f e | d g c B G B c2 ||  