Design a musical composition incorporating the alphabetic expression of the chosen structure and the provided melodic theme.
X:1
L:1/8
M:4/4
K:D
['DFAB A<F']  
X:1
L:1/8
M:4/4
K:D
"D" DFAB A<F d2 | DFAB A<F"A" E2 |"D" DFAB A<F d>e | (3fga"A" (3efg"D" f<d d2 |"D" DFAB A<F d2 | 
 DFAB A<F"A" E2 |"D" DFAB A<F d>e | (3fga"A" (3efg"D" f<d d>e |]  