Create musical pieces following the given structure and incorporating the suggested musical concept.
X:1
L:1/4
M:4/4
K:Ab
['A F'  
X:1
L:1/4
M:4/4
K:Ab
"Ab" A3/2 B/ A F | E3/2 F/ E C |"Eb7" E3/2 F/ E D |"Ab" C E3 |"Db" F3/2 G/ A F |"Ab" A3/2 E/ E A | 
"Bb7" F B B c |"Eb7" B3 z |"Ab" A3/2 B/ A F | E3/2 F/ E C |"Eb7" E3/2 F/ E D |"Ab" C E3 | 
"Db" F3/2 G/ A F |"Ab" E A2 d |"Eb7" c2 B2 |"Ab" A3 || E |"Ab" A A2 F/E/ | A A2 C/D/ | E E E E | 
"Bbm" E2"Eb" z E |"Eb7" G G2 F/E/ |"Ab" A c2 A/G/ |"Bb7" F B B c |"Eb7" B E A B |"Ab" c c2 B/A/ | 
 c c2 B/A/ |"Db" B A F A |"Ab" E E C D | E A2 d |"Ab/Eb" c2"Eb7" B2 |"Ab" A3 z |]  