Generate a musical piece using the presented motif and follow the alphabetical structure provided.
X:1
L:1/8
M:6/8
K:G
['D G2 A']  
X:1
L:1/8
M:6/8
K:G
 D | G2 A BAG | c2 B A2 D | G2 A BB^c | d3- d2 B | =c2 B ABc | d2 B G2 G | A2 D DED | (c3 B2) A | 
 GDD DED | G3- G2 |]  