Develop a musical composition using the outlined alphabetical depiction of the structure and the provided theme.
X:1
L:1/8
M:2/4
K:G
['B2 EE A(B/d/) B(A/G/) A(G/A/) BB A']  
X:1
L:1/8
M:2/4
K:G
 B2 | EE A(B/d/) | B(A/G/) A(G/A/) | BB A G/=F/ | E(D/E/) ^F | ^c | B B/B/ B A/G/ | AB FD | EB BA | 
 F2 ||  