Develop a musical composition based on the provided pattern of letters and incorporating the given motif within it.
X:1
L:1/8
M:2/4
K:C
['eGcG eGcG', 'c2 gceA acgc gfef d2 d2 gcec']  
X:1
L:1/8
M:2/4
K:C
 eGcG | eGcG | fedc B2 B2 | eGcG | eGcG | fdBd | c2 c2 :: gceA | acgc | gfef | d2 d2 | gcec | 
 gcec | gabg | c'2 c'2 :|  