Latin corrections?

"When chaos swarms into the world, that which is firm will flow. For by the light of the unknown the new breed shall be born"

I'm trying to translate this sentence to Latin. It's from a science fiction comic book I'm working on. Would my attempt be correct? thanks in advance!

"Cum chaos turbet indu mundus, ille quod est firmus vadet fluere. Namque per ignotus lucis, novus saeculum habebit natus"