Develop a musical piece that combines the given theme and letter-structured outline.
X:1
L:1/8
M:2/2
K:D
['(AG)S FGAF DEFD .E(A,{B,}A,G,) A,2 (AG) FGAF', 'E>(A,{B,} (3A,G,A,)', '(ag) fd{e}dc dfaf edcd efge fdef gbag']  
X:1
L:1/8
M:2/2
K:D
 (AG)S | FGAF DEFD | .E(A,{B,}A,G,) A,2 (AG) | FGAF DEFA | (3(fga) ec dBAG || FGAF DEFD | 
 E>(A,{B,} (3A,G,A,) E>(A,{B,} (3A,G,A,) | FGAF DEFA | faec d2 | (ag) | fd{e}dc (dcd).f | 
 edcd efge | fd{e}dc dfaf | ec (3(ABc) d2 (ag) || fd{e}dc dfaf | edcd efge | fdef gbag | 
 (3(fga) (ec) dBASG |]  