Construct a musical composition utilizing the provided motif and conforming to the specified structure.
X:1
L:1/8
Q:3/8=120
M:6/8
K:D
['z d3 fdf a3 A3 Bcd E2', 'D2 g f3 afd B3 g3 b3'  
X:1
L:1/8
Q:3/8=120
M:6/8
K:D
|: z | d3 fdf | a3 A3 | Bcd E2 A | F3 D2 A | ded cBc | def efg | B2 g cBc | d3 D2 :: g | f3 afd | 
 B3 g3 | b3 afd | c3 A2 G | FAA EAA | dAA FAA | B2 g cBc | d3 D2 :|  