Develop a musical composition by integrating the alphabetically represented musical pattern and the supplied melodic theme.
X:1
L:1/8
M:3/4
K:C
['egagec eg', 'ecAcec e/f/g/e/']  
X:1
L:1/8
M:3/4
K:C
 egagec | eg c2 g2 | egagec | eg d2 f2 :: ecAcec | e/f/g/e/ c2 g2 | ecAcec | e/f/g/e/ d2 f2 :|  