Craft a musical piece in accordance with the designated structure and theme.
X:1
L:1/8
M:4/4
K:D
['f3 e', 'dd ff'  
X:1
L:1/8
M:4/4
K:D
 A | A3 A A3 A | f3 e d3 A/A/ | f3 e d3 B | ^G4 A2 z A | e3 e f3 f | f3 e !fermata!d3 B | 
 A3 d f3 e | e4 d2 z ||[M:2/4] A | dd ff | dd ff | ee gg | b2 !fermata!a2 | ff dd/d/ | ff dd | 
 ee eg | fe d2 ||  