Generate harmonious tunes by incorporating the specified letter-based framework and the presented motif.
X:1
L:1/8
M:2/4
K:D
['z G>FGA F2']  
X:1
L:1/8
M:2/4
K:D
 D | DFFF | FAA z | G>FGA | F2 z D | DFFF | FAA z | G>FGA | F2 z G | GBBB | BAAA | AGGG | GFF z | 
 E>GG z | F>AA z | G>FGA | F2 A z | E>GG z | F>AA z | G>FGE | D2 z |]  