Create harmonious melodies following the given letter notation and incorporating the designated theme.
X:1
L:1/8
M:6/8
K:D
['a2 f']  
X:1
L:1/8
M:6/8
K:D
|:"D" d2 e fgf |"A7" edc"D" d2 A |"D" d2 e fgf |"A7"{f} edc"D" d3 ::"Bm"{e} d>cd B3 | 
"Em" e2 d"A7" cBA |"Bm"{e} d>cd B3 |"A7"{f} edc"D" d3 ::"D" a2 f a2 f |"A7" efg"D" f2 d | 
"D" a2 f a2 f |"A7" gec"D" d3 ::"G" B2 d"D" A2 d |"A7" efg"D" fed |"G" B2 d"D" A2 d | 
"A7"{f} edc"D" d3 :|  