Develop musical pieces that incorporate the given motif and follow the specified structure.
X:1
L:1/8
M:4/4
K:D
['Bc de fe f2'  
X:1
L:1/8
M:4/4
K:D
"Bm" Bc de fe f2 |"G" dB"A" cd e2"Bm" f2 | Bc de fe f2 |"G" dd BB"A" A2"Bm" B2 :|"D" ff aa fe d2 | 
"A" ee"G" bb"A" a2"D" f2 | ff aa fe d2 |"A" ee fe dc"Bm" B2 |]  