Develop a musical composition in line with the given structure and theme.
X:1
L:1/16
M:2/4
K:D
['a2af g4', 'g4 a2af g4 f2ed egec d4 D4', 'g4 f2ed'  
X:1
L:1/16
M:2/4
K:D
 a2af g4 | a2af g4 | f2ed egec | d2A2 F2D2 ||"^1)" a2af g4 | a2af g4 | f2ed egec | d4 D4 :: 
 f2ef g4 | f2ed c2A2 | f2ef g4 | f2ed e2g2 | f2ed egec | d4 D4 :|  