Develop a piece of music conforming to the stated structure and theme.
X:1
L:1/8
M:2/2
K:D
['defd cdec defd A2 dc B2 gf', 'f e2 ef edcB'  
X:1
L:1/8
M:2/2
K:D
 defd cdec | defd A2 dc | B2 gf edcB | Aaab agfe | defd cdec | defd A2 dc | B2 gf edcB |1 
 Agec d4 :|2 Agec d2 e2 |: f2 fg fedc | BA G2 g3 f | e2 ef edcB | Aaab agfe | f2 fg fedc | 
 BA G2 g3 f | e2 ef edcB |1 Agec d2 e2 :|2 Agec d4 ||  