Develop musical pieces that conform to the specified format and include the suggested musical theme.
X:1
L:1/8
M:2/2
K:D
['dBcA BAFB AFBF AFEF', 'f3 e d2 cd BAFB', 'BAFB AFBF AFEF', 'd2 cd BAFB'  
X:1
L:1/8
M:2/2
K:D
 dBcA BAFB | AFBF AFEF | Ad d2 f3 d | e2 df eB B2 | dBcA BAFB | AFBF AFEF | ABdg fdec | 
 dBAG FD D2 :: a3 g f3 e | d2 cd BAFB | Ad d2 f3 d | e2 df eB B2 | afge f3 e | d2 cd BAFB | 
 ABdg f2 ec | dBAG FD D2 ::"^variations" d2 cA BAFB | AFBF AFEF | Ad d2 f3 d | e2 df eB B2 | 
 d2 cA BAFB | AFBF AFEF | ABdg f2 ec | dBAG FD D2 :: afge f3 e | d2 cd BAFB | Ad d2 Adfd | 
 e2 df eB B2 | afge fdec | d2 cd BAFB | ABde fdec | dBAG FD D2 :|  