Develop a musical composition using the outlined alphabetical depiction of the structure and the provided theme.
X:1
L:1/8
M:6/8
K:D
['dFB A3 :|2 d3']  
X:1
L:1/8
M:6/8
K:D
 DDE FAd | f3 fec | edd dAF | AGG GEC | A,CE AcE | a3 agf | gec ABc |1 dFB A3 :|2 d3 dde | f3 fdB | 
 A3 AAB | AFB AFF | AGG GBd | g3 gec | Ace aaf | gec ABc ||1 dFB A3 :|2 d3 dde ||  