Construct melodies utilizing the provided motif and adhere to the outlined musical structure.
X:1
L:1/8
M:6/8
K:Dmix
['B dBG', 'deg aga bge', 'B2 G A2 G'  
X:1
L:1/8
M:6/8
K:Dmix
 B | dBG BAG | dBG G2 B | dBG AGE | GED D2 B | dBG BAG | B/^c/dB BAG | AGA BGB | GED D2 :: B | 
 deg aga | bge edB | deg aga | bge ega | bag age | ged e/f/ge | dBG AGE | GED D2 :: e/d/ | 
 B2 G A2 G | B2 D D2 d | BAG AGE | EDD Ded | B2 G A2 G | B/^c/dB BAG | AGA BAB | GED D2 :|  