Develop a musical piece that combines the given theme and letter-structured outline.
X:1
L:1/8
M:4/4
K:D
['D2 F/E/D FA A2', 'efdB AF F2']  
X:1
L:1/8
M:4/4
K:D
|: D2 F/E/D FA A2 | defd ef d2 | D2 F/E/D FA A2 | BF F2 BFAF | D2 F/E/D FA A2 | defd ef d2 | 
 efdB AF F2 |1 AFEG FDDE :|2 AFEG FD D2 |: efdB AF F2 | defd ef d2 | efdB AF F2 | AFEG FD D2 | 
 efdB AF F2 | defd efde | f2 df efdB |1 AFEG FD D2 :|2 AFEG FDDE ||  