Develop a musical composition based on the provided pattern of letters and incorporating the given motif within it.
X:1
L:1/8
M:6/8
K:G
['GFG ABc d2 e', 'gfg def gfg a2 g']  
X:1
L:1/8
M:6/8
K:G
 D | D2 G{A} GFG | ABc d2 e | =fef ded | cAG F3 | DGG{A} GFG | ABc d2 e | =fed cA^F | G3 G2 :: d | 
{a} gfg def | gfg a2 g | =fef ded | cAG F2 d |{a} gfg def | gfg a2 g | =fed cA^F | G3 G2 :|  