Craft a musical piece in accordance with the designated structure and theme.
X:1
L:1/8
Q:1/4=150
M:3/4
K:D
['B2 ef'  
X:1
L:1/8
Q:1/4=150
M:3/4
K:D
 FG |"D" AF A2 dc |"G" BG B2 ef |"A" ge c2 Bc |"D" BA F2 FG |"D" AF A2 dc |"G" BG B2 ef | 
"A" g>e cA Bc |"D" d2 d2 :: fg |"D" af dA cd |"G" c2 B2 ef |"A" ge cA Bc |"D" B2 F2 fg | 
"D" af dA cd |"G" c2 B2 ef |"A" g>e ce fe |"D" d2 d2 :|  