Construct a music composition that complies with the designated structure and theme.
X:1
L:1/16
M:2/4
K:D
['F4 d2d2 B4 e2e2 d2c2', 'a4 fgaf g4 efge'  
X:1
L:1/16
M:2/4
K:D
 A2G2 | F4 d2d2 | B4 e2e2 | d2c2 BABc | d2f2 a4 | F4 d2d2 | B4 e2e2 | d2c2 BABc | d4 :: f2g2 | 
 a4 fgaf | g4 efge | f4 dfdf | e4 cece | a4 fgaf | g4 efge | a4 A2c2 | d4 :|  