Construct a musical composition utilizing the provided motif and conforming to the specified structure.
X:1
L:1/8
Q:1/8=350
M:4/4
K:D
['dc BGGB ABAG', 'f2 df'  
X:1
L:1/8
Q:1/8=350
M:4/4
K:D
 A3 G FGAB | =c2 dc BGGB | ABAG FAdg | fdec Addc | A3 D (3EFG AB | (3=cdc dc BGGB | ABAG FAde | 
 fdec Adde || f2 df (3efe de | f2 df ec A2 | f2 df (3efe de | fdec Adde | f2 df (3efe de | 
 f2 df ecA^G | A2 (3Bcd ef (3gfe | afge d4 ||  