Develop complementary chords that synergize with the given tune.
AF FE | FA A2 | BB dB | BA A2 | AF FE | FA A2 | BB AD | 
 FE !fermata!D2 || A2 FA | B d2 z | A2 FD | F E3 | A2 FA | 
 B d2 B | AD FE | !fermata!D4 |]  
X:1
L:1/8
Q:1/4=90
M:2/4
K:Db
"Db" AF FE | FA A2 |"Gb" BB dB |"Db" BA A2 | AF FE | FA A2 |"Gb" BB"Db" AD | 
"Ab7" FE"Db" !fermata!D2 ||"Db" A2 FA |"Gb" B d2 z |"Db" A2 FD |"Ab" F E3 |"Db" A2 FA | 
"Gb" B d2 B |"Db" AD"Ab7" FE |"Db" !fermata!D4 |]  