Design a musical composition incorporating the alphabetic expression of the chosen structure and the provided melodic theme.
X:1
L:1/4
Q:1/4=180
M:6/4
K:Db
['A3/2 B/']  
X:1
L:1/4
Q:1/4=180
M:6/4
K:Db
"Db" A3/2 A/ A B A F |"Ab7" A G E"Db" D2 D |"Ab7" E3/2 F/ G G E G |"Db" B A3/2 F/ A2 A | 
"Gb" d3/2 d/ d d c B |"Db" A3/2 B/ A F3 |"Ab" A3/2 B/ c"Db" d A F |"Ab7" A3/2 G/ E"Db" D2 z || 
"Db" d3 d3 |"Gb" d3 d2 B |"Ab7" c3/2 c/ c c B A |"Db" A3/2 B/ A d2 z | d3 d3 | 
"Gb" d3 !fermata!d2 B/B/ |"Ab7" A3/2 B/ c"Db" d A F |"Ab7" A3/2 G/ E"Db" D2 z |]  