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
['cAG FGA', 'G2 (B/c/) ded dcB cdc cBc ded']  
X:1
L:1/8
M:6/8
K:G
 D | DGA B2 d | cAG FGA | BdB AFD | GBG AFD | DGA Bcd | cAG FGA | (B/c/d)B AFD | DGG G2 :| (B/c/) | 
 ded dcB | cdc cBc | ded =fef | dgg g2 a | bag =fed | cAG FGA | (B/c/d)B AFD | DGG G2 :|  