Construct a musical composition utilizing the provided motif and conforming to the specified structure.
X:1
L:1/8
M:3/4
K:C
['GB c2 d2 fd']  
X:1
L:1/8
M:3/4
K:C
 df a3 g | fd c2 e2 | df a2 gf | fd c4 | GB c2 d2 | fd c2 e2 | GB c2 d2 | fd c4 |]  