Develop a musical composition by integrating the alphabetically represented musical pattern and the supplied melodic theme.
X:1
L:1/8
M:9/8
K:G
['vG uG2', 'FED vdBd ece', 'FED vgag uf2 ue dBG uA2 uA']  
X:1
L:1/8
M:9/8
K:G
|:{vDEF} G2 vG uG2 ug dBG | uA2 uA ABG FED | vG2 vG uG2 ue def | ug2 uG GAG FED :: vdBd ece dBG | 
 uA2 uA ABG FED | vdBd ece def | g2 G GAG FED :: vgag uf2 ue dBG | uA2 uA ABG FED | gag f2 e def | 
 g2 G GAG FED :|  