Form a musical piece based on the provided motif while observing the defined structure.
X:1
L:1/4
M:4/4
K:C
['G F E']  
X:1
L:1/4
M:4/4
K:C
 z2 z G | c e d B | c G3/2 G/ E | F A G F | E C2 D/E/ | E E E C | D G G A | B c B A | G3 G/G/ | 
 c e d B | c G2 E | F A G F | E C2 D | E E D C | D G G F | E C C C | C3 z |]  