Develop a musical composition based on the provided pattern of letters and incorporating the given motif within it.
X:1
L:1/8
Q:1/8=232
M:4/4
K:D
['DA FA', 'AA fA AA']  
X:1
L:1/8
Q:1/8=232
M:4/4
K:D
|: DA FA DA FA | dA fA eA fA | gA fA ed cd | ed cB AG FE | DA FA DA FA | dA fA eA fA | 
 gA fA ed cB | cd eg fd d2 :: eA AA fA AA | gA AA fA AA | eA fA gA fA | ed cB AG FE | Dd dd ce ee | 
 df ff eg gg | fg af bg ec | d2 d2 d4 :|  