Craft a musical piece in accordance with the designated structure and theme.
X:1
L:1/8
M:12/8
K:D
['cBc d2'  
X:1
L:1/8
M:12/8
K:D
"D" f3 fed"G" g3 g2 f |"A" eAc ecA"D" f3 f2 e |"Bm" d3 dcd"G" efg e2 d |1 
"A" cBc ABc"D" d2 a"G" bag :|2"A" cBc ABc"D" d2 A"G" B2 A |:"D" F2 A AGF"G" G2 B BAG | 
"A" cBc ABc"D" d2 e f3 |"D" F2 A AGF"G" G2 B BAG |1"A" cBc ABc"D" d2 A"G" BAG :|2 
"A" cBc ABc"D" d2 a"G" bag |]  