Construct a musical composition following the given alphabetical structure and incorporating the specified motif.
X:1
L:1/8
Q:1/4=120
M:4/4
K:Amin
['(3(ABA) c>A e>Ac>A', 'g>cec g>cec (3(GAG) BG (3(cdc) e>c g>cec']  
X:1
L:1/8
Q:1/4=120
M:4/4
K:Amin
 (3(ABA) c>A e>Ac>A | (3(GAG) B>G B>GBG | (3(ABA) c>A e>Ac>A |"^NB1" [ce][Bd][Ac][GB] A2 A2 :: 
 (3(cdc) e>c g>cec | g>cec (3(GAG) BG | (3(cdc) e>c g>cec | [ce][Bd][Ac][GB] A2 A2 :|  