Craft a musical composition with the supplied motif and conforming to the necessary format.
X:1
L:1/8
Q:1/4=100
M:6/8
K:Eb
['B3- B2 G c B2- B2 B']  
X:1
L:1/8
Q:1/4=100
M:6/8
K:Eb
 B,2 B, | EEE GGG | FEF E3 | B3- B2 G | c B2- B2 B | cde BAG | ABA GEF | G>AG FEF | E3- EEF | 
 G3 FEF | E3- E z2 | B3- B2 G | c B2- B2 B | cde BAG | ABA GEF | G>AG FEF | E3 ||  