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:Ab
['z2 (E4 E>)A c>A (F4 F>)A G>F']  
X:1
L:1/8
M:4/4
K:Ab
"Ab" E>E E>F E>D C>D | E2 A2 E4 |"Db" F>F F>G B>A G>F |"Ab" E2 C2"Eb" B,4 |"Ab" E>E E>F E>D C>D | 
 E2 A2 A2 A>B |"Ab/Eb" c>c B>A"Eb7" B>B A>G |"Ab" A6 z2 ||"Ab" (E4 E>)A c>A |"Db" (F4 F>)A G>F | 
"Ab" E3 A c2 A2 |"Eb7" B6 z2 |"Ab" (E4 E>)A c>A |"Db" (F4 F>)A G>F |"Ab/Eb" E3 A"Eb7" c2 B2 | 
"Ab" A6 z2 |]  