Develop a musical composition using both the specified melodic theme and the alphabetical pattern naming.
X:1
L:1/8
M:3/4
K:G
['B3 A']  
X:1
L:1/8
M:3/4
K:G
 d>b gB dG |"D7" Fe df c2 |"D7" Fe df cF |1"G" Ge dg B2 :|2"G" G6 |][K:D]"D" (FA) B3 A | 
"A7" Ag Ag c2 | (GA) B3 A |"D" Af Af d2 | FA B3 A |"A7" Ag Ag c2 | (GA) gA cf |"D" d6 |]  