Generate harmonious tunes by incorporating the specified letter-based framework and the presented motif.
X:1
L:1/8
M:4/4
K:C
['C2 (c2 c2) (Bc) dBGB c2', 'G2 ef']  
X:1
L:1/8
M:4/4
K:C
 ED | C2 (c2 c2) (Bc) | dBGB c2 cd | ecec fdfd | geAd cBAG | C2 (c2 c2) (Bc) | dBGB c2 Bc | 
 dBdB cAGF | G2 G2 G2 :: ef | gfed cBAG | F2 F2 F2 (fg) | agfe dcBA | G2 G2 G2 ef | gege afaf | 
 gege afaf | gefd ecdB | c2 c2 c2 :|  