Whether flames spread "everywhere" depends on the context. Fire needs fuel, oxygen, and an ignition source to spread. If those elements are continuously available in a given area, then a fire could theoretically spread throughout that area. However, in most real-world scenarios, fires are limited by:

• Limited Fuel: A fire will stop when it runs out of combustible material.
• Oxygen Availability: In enclosed spaces, a fire can consume all the available oxygen and extinguish itself.
• Barriers: Natural or artificial barriers like firewalls, open spaces, or non-combustible materials can stop the spread of fire.

So, while it's possible for a fire to spread rapidly and extensively, it's rare for it to literally spread everywhere without limitations.