Develop a musical composition in line with the given structure and theme.
X:1
L:1/8
M:2/2
K:A
['dBcA BAFA'  
X:1
L:1/8
M:2/2
K:A
|:"A" afec A2 Bc |"Bm" dBcA BAFA |"A" EAce a2 a2 |"E7" gaba gefg |"A" afec A2 Bc |"D" dBcA BAFA | 
"Bm" dBcA BAFA |"E7" EAAG"A" A4 ::"A" agab c'bag |"F#m" agfe c2 BA |"Bm" FBBc dcBA | 
 FBBc"E7" defg |"A" agab c'bag |"F#m" agfe fece |"Bm" dBcA BAFA |"E7" EAAG"A" A4 :|  