Compose a musical piece using the specified sequence's alphabetical representation and the provided motif.
X:1
L:1/8
M:2/2
K:A
['c2 (!slide![ee]2 [ee])fed', 'A4 e2 ef abaf ed [df]2{f} [dg]4']  
X:1
L:1/8
M:2/2
K:A
 efed c2 (!slide![ee]2 | [ee])fed c2 (!slide![ee]2 | [ee])fed cBAc | B G3 A4 :: e2 ef abaf | 
 ed [df]2{f} [dg]4 | ecec ([ce][ca])[ca][ca] | [ce] [ca]2 [ce] [ca]4 :|  