Develop a musical composition using the outlined alphabetical depiction of the structure and the provided theme.
X:1
L:1/16
M:2/4
K:C
['G2 dfdB c2e2 g4 e2c2 BGA B']  
X:1
L:1/16
M:2/4
K:C
 G2 |"C" c4"G7" dfdB |"C" c2e2 g4 |"G7" f2d2"C" e2c2 |"Dm" A2dc"G7" BGA B |"Am" c4"G7" dfdB | 
"C" e4"Dm" fagf |"C" e2c2"G7" A2B2 |"C" c4 c2 :: G2 |"G" B2c2 d2B2 |"C" G2gf"C7" e4 | 
"F" c2a2"Dm" gfed |"G" cBdc"G7" BAGF |"C" E2e2"Dm" F2f2 |"C" G2g2"F" A2a2 |"C" g2eg"G7" f2B2 | 
"C" c4 c2 :|  