Generate harmonious tunes by incorporating the specified letter-based framework and the presented motif.
X:1
L:1/8
M:4/4
K:Gmix
['G2 dG B,GG,G']  
X:1
L:1/8
M:4/4
K:Gmix
 G2 dG B,GG,G | F2 cF CFA,F | G2 dG B,GG,G | FGAc dBcA | G2 dG B,GG,G | F2 CF A,FCG | FDCD FGAc | 
 dBcA GA_Bc ||  