Develop a musical composition using both the specified melodic theme and the alphabetical pattern naming.
X:1
L:1/8
M:4/4
K:G
['', 'AG (3AGF G2', 'AG (3(AGF) G2', 'AG (3(AGF) G2']  
X:1
L:1/8
M:4/4
K:G
 (3DEF |: G2 BG ABcA | dg{a}ge dBGB | c3 d BGDG | (3cBA BG AF F2 | GDB,D G,B,DG | BG (3ABc dBGB | 
 dg (3Bcd edcF |1 AG (3AGF G2 (3DEF :|2 AG (3AGF G2 AG |: (3FED A,D FAcA | BGDG Bcdg | 
 ec c2 dB B2 | cA ag (3fed (3cBA | DB B2 Dc c2 | d2 (3ed^c dBGB | dg (3Bcd edcF |1 
 AG (3(AGF) G2 AG :|2 AG (3(AGF) G2 Bc |: dg g2 dgbg | g2 bg agfg | ea a2 agfe | (3gfe d^c d2 d=c | 
 (3Bcd BG (3ABc AF | GDB,D GABc | dg (3Bcd edcF |1 AG (3(AGF) G2 Bc :|2 AG (3(AGF) G2 z2 ||  