Generate harmonious tunes by incorporating the specified letter-based framework and the presented motif.
X:1
L:1/8
M:6/8
K:G
['G G']  
X:1
L:1/8
M:6/8
K:G
 G G G B B B | A B A G2 z | G G G G A B | d3 A2 c | (B c) d A B c | B A G F E D | G2 G G A B | 
 A2 A A B c | B B d e2 c | (B2 A) G3 |]  