Formulate a musical piece by utilizing the specified motif and alphabet-based structure.
X:1
L:1/8
M:4/4
K:A
['B2 A B2 E FB A2 BA']  
X:1
L:1/8
M:4/4
K:A
"A" EAcA B2 Ae- |"^/C#" eAcA BAFD |"D" EAcA B2 Af- | fe (3c/B/A/"E" BAFD |"A" EAcA B2 Ae- | 
"^/C#" eAcA BAFA- |"D" A2 ec BAFA- |1 A A3"E" BAFA :|2"D" A3 A2 E FA ||"E" B2 A B2 E FB | 
"F#m" A2 BA ABBA |"D" c2 BA BAFB | cBAF AEFA |"E" B2 A B2 E FB |"F#m" A2 BA ABBA | 
"D" f2 e a2 (3g/f/e/ a- | a (3g/f/e/ c BAFA |"E" B2 BA BdcB |"F#m" cAAA A3 B |"D" c2 BA BAFB | 
"^(G)" cBAF BEFA |"E" B2 A B2 E FB |"F#m" A2 BA AAce |"D" f2 e a4 c'- | c'baf ecBA ||  