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:D
['FG^GA BAGA', 'd2 A2 fedc', 'AG FEFG A2 F2 ^G4- GEFG A2']  
X:1
L:1/8
M:4/4
K:D
|: A2 | FG^GA BAGA | f2 d2 f2 d2 | FG^GA BAGA | E4- E2 D2 | EFGA BA^GA | e2 c2 e2 c2 |1 
 AdcB AGE=F | F4- F2 :|2 ABcB AGEF | D4- D2 |: A2 | F4- FF G/^G/A | f3 f f2 ec | 
 dA F/G/A dc{ef} ed | c2 B^A B4 |1 E4- EE F/G/^G/A/ | c4- c2 B^G | A>dcB AGE=F | F>GAG F2 :|2 
 geBe g2 ag | fdAd f2 Ad | B/c/d ef gecA |{de} d2 f2 d2 |: A2 | fedc d2 A2 | fedc dAFA | 
 B^ABc d>edB |1 A4 F2 A2 | GFGA A2- AG | FEFG A2 F2 | ^G4- GEFG | A2 B2 c2 :|2 A4- A2 A2 | 
 B^ABd g2 d2 | A^GAd f2 d2 | A^GAc f2 e2 | d4- d2 ||  