Develop a musical piece that combines the given theme and letter-structured outline.
X:1
L:1/16
M:2/4
K:D
['AGFG A2A2 BABc e2d2 fgaf e2f2', 'fgaf e2f2']  
X:1
L:1/16
M:2/4
K:D
 AGFG A2A2 | BABc e2d2 | fgaf e2f2 | dfed B2A2 | AGFG A2A2 | BABc e2d2 | fgaf e2f2 | A2>d2e d4 :: 
 agfg a2a2 | gfga b2a2 | fgaf e2f2 | dfed B2A2 | AGFG A2A2 | BABc e2d2 | fgaf e2f2 | A2>d2e d4 :|  