Craft a musical piece in accordance with the designated structure and theme.
X:1
L:1/8
M:2/4
K:D
['d2 (f/e/d/e/) (fd)(dc)', '(FA)(AG) (FA)(AG) (F/A/d/e/) dc/B/ (cA)(AG) (F/G/A/B/) AG', 'A ded dfd cde a2 A Bcd', 'f/g/ aba agf gag g2 f efg'  
X:1
L:1/8
M:2/4
K:D
 d2 (f/e/d/e/) | (fd)(dc) | B2 (efed) | cAAc | d2 (f/e/d/e/) | (fd)(dc) | Be (dcBA) | 
 d2 !fermata!D2 :: (FA)(AG) | (FA)(AG) | (F/A/d/e/) dc/B/ | (cA)(AG) | (F/G/A/B/) AG | FA (AB/c/) | 
 d>e (fe/d/) | a2 !fermata!A2 :|[M:6/8][K:C] A | ded dfd | cde a2 A | Bcd cAc | d3 d2 :| f/g/ | 
 aba agf | gag g2 f | efg a2 d | (d3 c2) A | GAG g2 e | cde a2 A | Bcd cAc | e3 e2 :|  