Craft a musical piece that incorporates the given motif and follows the outlined structure.
X:1
L:1/8
Q:3/4=50
M:3/4
K:C
['C2 Good B2 cBAG A2 D2 G2']  
X:1
L:1/8
Q:3/4=50
M:3/4
K:C
 C2 |[K:G]"^A Good Tune" B2 cBAG | A2 D2 G2 | AGAB | B4 A2 | d2 cBAG | g2 fedc | B2 c2 A2 | G6 ::  