Construct a musical composition utilizing the provided motif and conforming to the specified structure.
X:1
L:1/8
M:2/2
K:Dmix
['d2 ed cAGB Add^c dfag fded cAGE']  
X:1
L:1/8
M:2/2
K:Dmix
 d2 ed cAGB | Add^c dfag | fded cAGE | E2 cE ED D2 :|  