Craft a musical work adhering to the specified theme and structure.
X:1
L:1/8
M:4/4
K:D
['f2 fd A2 F2 GF GF G4', 'f2 fd'  
X:1
L:1/8
M:4/4
K:D
|: f2 fd A2 F2 | GF GF G4 | ed cA B2 c2 | defd A4 | f2 fd A2 F2 | GF GF G4 | ed cA B2 c2 | d4 d4 :: 
 f2 fd f2 fd | gf ed e2 ef | gfed cABc | defd A4 | f2 fd A2 F2 | GF GF G4 | ed cA B2 c2 | d4 d4 :|  