Codes

treasure (1000 gems)
festival (1000 gems)
spooky (1000 gems)
coralreef (1000 gems)
feast (1000 gems)
roar (1000 gems)

Hope I helped! There is a new one every month, make sure to check!

(P.S. if you dont know where the place to enter it in to, it just right below the place where you enter your password in, in the signing in place)