i am in cerulian and then i went to vermilion.a little time i went back to cerulian.then i wanted to go to vermilion(i was trying to find celadon)when i pressed to go down but it wrote

''You seem to have stepped into an empty void. You can here a voice above you warning "Playing with time and space can bring havoc". You are teleported back to your old location.''

(the same with lavender)
what's this?

It's a message that appears when you try to enter an area that hasn't been made yet, so you don't get stuck.

but i went to vermillion and then i went to cerulian.then i tried to go to vermillion.then it wrote the message!some minutes later i wanted to go to lavender and it wrote the same message