Develop a musical composition by integrating the alphabetically represented musical pattern and the supplied melodic theme.
X:1
L:1/4
M:9/4
K:D
['d3 F E D', 'F3/2 G/ A B2 A']  
X:1
L:1/4
M:9/4
K:D
 d3 F E D | d3 F E D | d3 F E D | D3 D2 |: E | F3/2 G/ A B2 A d2 E | F3/2 G/ A B2 A e2 E | 
 F3/2 G/ A B2 A d2 E |1 F3/2 G/ A B2 A d2 D :|2 d3 F E D ||  