Craft a musical piece in accordance with the designated structure and theme.
X:1
L:1/8
M:4/4
K:Dmix
['d cAGB ADDE FDAD FGAd cAGB AGFG', 'efge fded cA A2 f2 df edcA', 'd BAGB A2 dB cAGB', 'fdad fdaf ge e2 fdad fdad fgfe'  
X:1
L:1/8
M:4/4
K:Dmix
 d | cAGB ADDE | FDAD FGAd | cAGB AGFG |1 Adde fde :|2 Add^c d3 |] e | f2 df efge | fded cA A2 | 
 f2 df edcA | Add^c defg | agfa gfe^c | dfed cAAG | Add^c defd | Adde fde |] d | cAGB A3 d | 
 BAGB A2 dB | cAGB AGFG | Adde fded | cAGB A3 d | BAGB A2 dB | cAGB AD D2 | Add^c d3 |] e | 
 fdad fdad | fdaf ge e2 | fdad fdad | fgfe dc A2 | defg a3 f | bfaf gfeg | fedf edcA | d^cde fde |]  