Develop a musical composition based on the provided pattern of letters and incorporating the given motif within it.
X:1
L:1/8
M:6/8
K:A
['[CE] [CA]4', '[Ec]3 [CA]3 [FA]3 [DF]3 [DE]2 [DE][DG][DF][DE]']  
X:1
L:1/8
M:6/8
K:A
 [CE][CE][CE] [DF]2 [CE] | [CE] [CA]4 [CA] | [EB][EB][EB][EA][EA][EB] | [Ec]3- [Ec]2 [CE] | 
 [CE][CE] E[DG][DF][DE] | [CE] [CA]4 ([EB]/ [EB]/) | [Ec][Fd][Ec][DB][DF][DG] | [CA]6 |: 
"^Refrain" [Ec]3 [CA]3 | [FA]3 [DF]3 | [DE]2 [DE][DG][DF][DE] | (E3 A3) | [Ec]3 [CA]3 | 
 [FA]3 [DF]3 | [DE]2 [DE][DG][DF][DE] | [CA]6 |]  