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>Bd d>ef f<ag f>ed', 'f>ed B>cd', 'A>Bc A>df f>ed', 'A>aa a>gg f>ed']  
X:1
L:1/8
M:6/8
K:D
|: f | A>Bd d>ef | f<ag f>ed | g>fg B2 c | B>ed c2 A | A>Bd d>ef | f<ag f>ed | B>cd c<ec | d3 d2 :: 
 f/g/ | a>Aa A>AA | aAg f>ed | g>fg B2 c | B>ed c2 A |1 a>Aa AA/A/A | a>ag f>ed | B>cd c<ec | 
 d3 d2 :|2 A>Bd d>ef | f<ag f>ed | B>cd c/d/ec | d3- d2 |: A/B/ | A>AA A>Bc | A>df f>ed | 
 B>BB B>gf | e>fd c>AB | A>AA A>Bc | A>df f>ed | B>cd c<ec | d3 d2 :: f/g/ | a>AA A>aa | 
 a>gg f>ed | g>fg B2 c | B>ed c2 A |1 a>AA A>aa | a>gg f>ed | B>cd c<ec | d3 d2 :|2 A>Bd d>ef | 
 f/g/ag f>ed | B/c/dB c<ec | d3- d2 ||  