Formulate a musical piece by utilizing the specified motif and alphabet-based structure.
X:1
L:1/8
Q:1/4=120
M:2/4
K:G
['G2 G2']  
X:1
L:1/8
Q:1/4=120
M:2/4
K:G
 D | G2 G>G | G2 G>G | A>A d>c | B>A G>G | A>A A>A | A2 AA | dd e>g | f>e dz/g/ | g2{g} fe | 
{f} edcB | c2 c>e | c2 c>e | d>c Bz/A/ | AG GA | B2 AG | GE AG |{G} F2 E>D | G2 G2 | G2 z2 | 
 d2 e>f | gd dB | G2 G2 | G2 z2 |]  