Craft a musical piece in accordance with the designated structure and theme.
X:1
L:1/8
Q:1/2=90
M:4/4
K:D
['dc d2 D2 D2 AG FA d2', 'AG FAdA FAdA B2 G2 G2 BA'  
X:1
L:1/8
Q:1/2=90
M:4/4
K:D
 dc | d2 D2 D2 AG | FA d2 d2 (3fed | e2 E2 E2 ed |"^NB" ce a4 ga | bagf agfe | (gf)ge dcBA | 
 Bdce dfeg | f2 d2 d2 :: AG | FAdA FAdA | B2 G2 G2 BA | GBec GBed | c2 A2 A2 dc | d2 (b2 b)agf | 
 (gf)ge dcBA | Bdce dfeg | f2 d2 d2 :|  