Develop musical pieces adhering to the provided chord changes.
'A', 'D', 'A', 'F#m', 'Bm', 'E7', 'Bm', 'E7', 'A', 'D', 'A', 'F#m', 'Bm', 'E7', 'A', 'A7', 'D', 'E7', 'A', 'D', 'A', 'Bm', 'E7'  
X:1
L:1/8
M:2/2
K:A
"^A" |:"A" (uAB)cd eAce |"D" fAdf"A" edc(uB | AB)cd"F#m" eAce |1"Bm" fdBc"E7" d2 ucB :|2 
"Bm" fdBc"E7" defg |]"^B" |]"A" aA (3vAuAvA vcAce | aAag"D" fefg |"A" aA (3vAuAvA"F#m" vcAce | 
"Bm" dcBc"E7" defg ||"A" aA (3vAuAvA vcAce |"A7" aAag"D" f2 (ufg) | afge fdec | 
"E7" dfBc d2 (ucB)"^C" |:"A" Aece Aece | Aece"D" d2 (ucB) |"A" Aece Aece |"Bm" fdBc"E7" d2 (ucB) :|  