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:Ador
['e3 d c2 A2', 'Bcdf ec c/B/c']  
X:1
L:1/8
M:4/4
K:Ador
|: e3 d c2 A2 | e2 A2 B2 cd | e3 d c2 A2 | d2 G2 Bc d2 | e3 d c2 A2 | e2 A2 B3 A | G2 gf gage | 
 d2 G2 Bcdf :: ec c/B/c agfa | e2 A2 Bcdf | ec c/B/c gfeg | d2 G2 Bcdf | ec c/B/c agfa | 
 gfeg f2 e^c | d/e/d ef gage | d2 G2 Bc d2 :|  