Develop musical pieces that conform to the specified format and include the suggested musical theme.
X:1
L:1/8
Q:1/4=200
M:4/4
K:D
['B2 fgfe dBAB GBdB', 'f2 dB GBdB caec'  
X:1
L:1/8
Q:1/4=200
M:4/4
K:D
 fB B2 fgfe | dBAB GBdB | cAAd AAec | afdB ecAc | dB B2 fgfe | dBAB GBdB | cAdc ec A2 | afec B4 :| 
 f2 dB GBdB | caec dB B2 | f2 dB GBdB | caec Bcde | fd d2 fgfe | dBAB GBdB | cAdA eA A2 | 
 afec B4 :|  