Develop a musical composition using the outlined alphabetical depiction of the structure and the provided theme.
X:1
L:1/8
M:4/4
K:G
['G2 GF GABc dBeB dBAG BEED EFGA']  
X:1
L:1/8
M:4/4
K:G
"^A" (3DEF |"G" G2 GF GABc |"G" dBeB dBAG |"Em" BEED EFGA |"Em" BGAF"D7" GFED |"G" G2 GF GABc | 
"G" dBeB dBAG |"Em" BEED EFGA |"D7" BGAF"G" G2 :|"^B" B2 |"Em" Beed e3 f |"Em" geaf gfed | 
"D" Add^c d3 e |"D" fdaf gfed |"Em""C" Beed e3 f |"Em""C" geaf gfed |"Em""G" BAGF EFGA | 
"D7" BGAF"G" G2 :|  