Develop a musical composition by integrating the alphabetically represented musical pattern and the supplied melodic theme.
X:1
L:1/8
M:4/4
K:D
['DFAF GFEG FDFA dfef geag', 'geag fd=cA BG G2']  
X:1
L:1/8
M:4/4
K:D
 DFAF GFEG | FDFA dfef | geag fdd=c | AG G2 EFGE | DFAF GFEG | FDFA dfef | geag fddf |1 
 eddc dBAF :|2 eddc d3 e || f2 af g2 ag | fgaf geag | fd=cA BG G2 | ABcA dcde | f2 af g2 ag | 
 fgaf geag | fd=cA BG G2 |1 ABcA dcde :|2 ABcA dBAF ||  