Develop a musical composition in line with the given structure and theme.
X:1
L:1/16
M:2/4
K:D
['D2F2A2d2 f2a2 a4 A,2C2E2A2 e2g2 g4 D2F2A2d2', 'agfg agfg'  
X:1
L:1/16
M:2/4
K:D
 D2F2A2d2 | f2a2 a4 | A,2C2E2A2 | e2g2 g4 | D2F2A2d2 | f2a2a2g2 | f2ed egdc | d4 D4 :: agfg agfg | 
 agfg a4 | gfef gfef | gfef g4 | D2F2A2d2 | f2a2a2g2 | f2ed egdc | d4 D4 :|  