Develop a musical piece using the given motif and adhere to the outlined musical structure.
X:1
L:1/8
Q:1/8=160
M:6/8
K:D
['F2 A G2 B', 'faf def'  
X:1
L:1/8
Q:1/8=160
M:6/8
K:D
 z | F2 A G2 B | ABc d3 | F2 A G2 B | AFD E2 D | F2 A G2 B | ABc d2 e | f2 d g2 f | edc d2 :| z | 
 faf def | gbg efg | faf def | ecA A2 g | faf def | gbg efg | f2 d g2 f | edc d2 :|  