Craft a musical composition with the supplied motif and conforming to the necessary format.
X:1
L:1/4
M:3/4
K:Eb
['B B']  
X:1
L:1/4
M:3/4
K:Eb
 E/E/E/ | E3/2 E/F/G/ | G F/F/F/G/ | A3/2 F/B/A/ | A G G/A/ | B3/2 G/c/A/ | F z B | G B B | e c c | 
 A c c | e d c | c B B | e B B | A G G | G A B | c2 d d | e2 c3/2 A/ | G2 F2 | E2 z/ |]  