Compose a piece of music using the provided motif and follow the designated alphabet character structure.
X:1
L:1/8
M:6/8
K:Amin
['c2 e g2 a']  
X:1
L:1/8
M:6/8
K:Amin
"E7" E |"Am" A>BA c2 d |"Am" e>dc"D7" B2 A |"G" G>AG B2 c |"G" dge dBG |"Am" A>BA c2 d | 
"Am" e>dc"^(G)" Bcd |"^(F)" e2 A"E7" AB^G |"Am" A3- A2 ::"G7" B |"C" c2 e g2 a |"C" g>ec gec | 
"G" G2 B d2 e |"G" dge dBG |"C" c2 e g2 a |"C" g>ec"E7" de^g |"Am" a2 A"E7" AB^G |"Am" A3- A2 :|  