Craft a musical composition that incorporates the supplied alphabet sequence and motif.
X:1
L:1/8
M:2/2
K:C
['e e2 f2 d2 c2 d2 B2', 'B2 c3']  
X:1
L:1/8
M:2/2
K:C
|: e e2 f2 | d2 c2 d2 B2 | c3 ::"_NB1" z cA B2 | c3 c dc d2 | d2 dc A2 B2 | c3 d"^+" d4 | 
"_NB2" c3 :|  