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:D
['A>FD A>FD G>FG', 'a>fd A>FD B,>EG B3']  
X:1
L:1/8
M:6/8
K:D
|: d>cB | A>FD A>FD | G>FG E3 | D>FA D>FA | B>ec d2 B | A>FD A>FD | G>FG E2 d | c/d/ec A>fe | d3 :: 
 d>fg | a>fd A>FD | B,>EG B3 | A>ce g>fg | b>a^g a3 | a>fd A>FD | B,>EG B3 | c>Bc e>cB | A3 A3 | 
 B>GB d>cB | A>FA d>AF | G>BG F>AF | E>ed c>BA | d>AF d>AF | G>FG E2 d | c/d/ec A>fe | d3 :|  