Develop a musical composition that includes the supplied motif while following the designated alphabetical pattern.
X:1
L:1/8
M:6/8
K:C
['G E2', 'c2 B']  
X:1
L:1/8
M:6/8
K:C
 C2 G E2 A | G E2 D2 C | c2 e d B2 | A3 G3 | C2 G E2 A | G E2 D2 C | c2 e d B2 | A3 G2 z |: 
 g2 =f e B2 | c2 B Ade | f2 e d B2 | A3 G AB | c2 B A E2 | F2 E DAB | cde f2 e | d3 c2 z :|  