Craft a musical piece in accordance with the designated structure and theme.
X:1
L:1/8
M:3/4
K:Dmix
['A2 F2 D2 CD EC EF GF', 'Ad cB G2- GA Bc B2', 'c2 Gc Fc'  
X:1
L:1/8
M:3/4
K:Dmix
|: A2 F2 D2 | CD EC EF | GF ED EG | F2 DE FG | A2 F2 D2 | CD EC EF | GF ED EF | D2 DE FG :: 
 A2- Ad cB | G2- GA Bc | B2 A2 GF | GF D2 FG | AD Ad cB | G2- GA Bc | B2 AG FG |1 A2- AG FG :|2 
 A2- A2 FA |: d2 Ad Gd | FG AD FA | d2 Ad Gd | FG AD FA | c2 Gc Fc | E2- EF GE | c2 Gc Fc |1 
 EF GA FD :|2 EF GE FG ||  