Develop a musical composition based on the provided pattern of letters and incorporating the given motif within it.
X:1
L:1/8
M:4/4
K:Bmin
['', 'FBfe dcBd cded', '', '(3ddd dc', 'fddc afeg fd']  
X:1
L:1/8
M:4/4
K:Bmin
 BA |: FBfe dcBd | cded cBAB | Fffe dcBA | FB (3BBB FB (3BBB | FBfe dcBd | cded cBAc | 
 (3ddd dc defg | afeg fddB :| afeg fddc |: (3ddd dc dfed | (3cBA eA fAeA | (3ddd dc defa | 
 gfeg fddA | dfaf dfaf | cefe cefe | Bcde fefg | afeg fddc :| afeg fd (3ddd :|  