Form a musical piece based on the provided motif while observing the defined structure.
X:1
L:1/8
M:4/4
K:G
['EFGF E2 B2', 'B2 AGFG A2 dd'  
X:1
L:1/8
M:4/4
K:G
"^A" EFGF E2 B2 | EFGF E2 B2 | c2 Ac B2 G2 | AG FE D4 | EFGF E2 B2 | EFGF E2 B2 | c2 Ac B2 G2 | 
 A2 F2 G4 ::"^B" G2 BB G2 B2 | AGFG A2 dd | G2 BB G2 B2 | AGFE D2 d2 | G2 BB G2 B2 | AGFG A2 dd | 
 BdcB AcBA | G2 F2 G2 F2 :|  