Compose tunes based on the given letter-based musical structure and the supplied motif.
X:1
L:1/8
M:4/4
K:D
['f2 d2']  
X:1
L:1/8
M:4/4
K:D
 F>G |"D" A>F A>d f2 d2 |"G" B>G B>d g2 e2 |"A7" c>A c>e a>g f>e |"D" (3dfe (3dcB"A7" A2 F>G | 
"D" A>F A>d f2 d2 |"G" B>G B>d g2 f>e |"D" d>e d>B"A7" A>B c>e |"D" d2 f2 d2 f>g || a>b a>f d2 A2 | 
"A7" e>f e>d c2 A2 |"D" a>^g b>a"Bm" f>d c>d |"A7" (3efe (3dcB"D7" A2 f>g |"D" a>b a>f d2 A2 | 
"A7" e>f e>d c2 a>g |"D" f>a"^(Bm)" f>d"Em" B>g e>c |"D" d2 f2 d2 ||  