Create musical pieces following the given structure and incorporating the suggested musical theme.
X:1
L:1/8
M:2/4
K:D
['D DE=FG A^GAc ddA^G A2 z A']  
X:1
L:1/8
M:2/4
K:D
 D | DE=FG | A^GAc | ddA^G | A2 z A | _BAGB | AG=FA | G=FEF | D2 z |]  