Formulate a musical piece by utilizing the specified motif and alphabet-based structure.
X:1
L:1/8
Q:1/8=80
M:2/4
K:G
['G>G Bd d/c/A/G/ FA GG/G/ BG', '=f>gfd d/c/A/G/ FA']  
X:1
L:1/8
Q:1/8=80
M:2/4
K:G
 G>G Bd | d/c/A/G/ FA | GG/G/ BG | A>G FD | G>G Bd | d/c/A/G/ FA | GG/G/ BG | AD G2 :| =f>gfd | 
 d/c/A/G/ FA | g/g/g bg | a>g fd | =f>gfd | d/c/A/G/ FA | G/G/G BG | AF G2 :|  