Craft a musical composition that incorporates the supplied alphabet sequence and motif.
X:1
L:1/8
M:4/4
K:Eb
['E3 G>A B2 c>d e>f ec c2']  
X:1
L:1/8
M:4/4
K:Eb
 E3 G>A | B2 c>d | e>f ec | c2 B>G | A2 c>A | G2 E>G | F2 E>D | E8 B :|  