Craft a musical composition that incorporates the supplied alphabet sequence and motif.
X:1
L:1/4
Q:1/4=120
M:2/2
K:G
['c B', 'A A']  
X:1
L:1/4
Q:1/4=120
M:2/2
K:G
"^A" G3/2 A/ | B c B c | c e e c | B A A G | A2 B3/2 c/ | d d c B | e c B A | A G G3/2 F/ | G2 || 
"^B" g3/2 f/ | c A A A | A2 f3/2 e/ | e B B B | B2 G3/2 A/ | d d c B | d c B A | A A A3/2 F/ | 
 G2 ||  