Develop a musical composition based on the provided pattern of letters and incorporating the given motif within it.
X:1
L:1/8
M:2/2
K:G
['c2 B2 GB GE D2 EAAB cBcd']  
X:1
L:1/8
M:2/2
K:G
 ed |"Am" c2 Ac"G" B2 GB |"Am" AGEF"G" GE D2 |"Am" EAAB cBcd |"Am" eaaf"G" gedB | 
"Am" c2 Ac"G" B2 GB |"Am" AGEF"G" GE D2 |"Am" EAAB cBcd |"G" eddB"Am" A2 :| z d |:"Am" eaab ageg | 
 agbg agef |"G"{a} g2 ga gfef |"^(Em)" geaf"G" ge d2 |"Am" eaab ageg | agbg agef |"G" g2 ge a2 af | 
"^(Em)" bgaf gfed :|  