Develop a musical composition using the outlined alphabetical depiction of the structure and the provided theme.
X:1
L:1/8
M:3/2
K:C
['F4 D2 EF GFED E2 C4 G2', 'f2 e2']  
X:1
L:1/8
M:3/2
K:C
 F4 D2 EF GFED | E2 C4 G2 F2 E2 | F3 G A2 GF EFED | A,2 D4 F2 E2 D2 :: d4 de f2 e2 d2 | 
 e2 c4 g2 f2 e2 | f3 g a2 gf efed | A2 d4 F2 E2 D2 :|  