Develop a musical composition in line with the given structure and theme.
X:1
L:1/8
M:9/8
K:D
['def B2'  
X:1
L:1/8
M:9/8
K:D
|:"Bm" def B2 B d2 B |"Bm" def B2 B"A" ecA |"Bm" def B2 B Bcd |"A" c2 A Aaf ecA ::"D" def faf faf | 
"D" def faf"A" ecA |"D" def faf faf |"A" ecA a^gf ecA :|  