Construct a melodic piece using the alphabet-based musical sequence and the given motif.
X:1
L:1/8
M:3/2
K:G
['BAGF G2 E2 gfeg fe^df e2', 'B2 G2']  
X:1
L:1/8
M:3/2
K:G
"^1" E4 G4 B4 | e2 dc BAGF G2 E2 | gfeg fe^df e2 B2 | A2 cB AGFE ^D2 B,2 | E4 G4 B4 | 
 e2 =dc BAGF G2 E2 | gfeg fe^df e2 BA | GFEG B,2 ^D2 E4 ||"^2" E4 G4 B4 | g2 fe =dcBA B2 G2 | 
 bagb agfa g2 dc | BAGB D2 F2 G4 | BA^G=F EdcB c2 A2 | A=G^FE DcBA B2 G2 | gfeg fe^df e2 BA | 
 GFEG B,2 ^D2 E4 |]  