Level 1

Level 1 is the area you get when you go through a door in level 0 that has a red exit sign above it (well its the most common level you will end up in)

Level 1 is like level 0 but instead of yellow wallpaper its yellow concrete level 1 was first discovered in 1913 by an agent who was also the first person to find and exit to the backrooms after entering level 1 she never made it back out. Lights in level 1 will begin to flicker and then eventually shut off for 4 hours to a day when the lights are off is off this level is extremely dangerous entities that reside here are rippers, deathmoths, skin stealers, smilers and frogottens. To escape level 1 you have to wait for the lights to go out and then find a glass door open it and you will enter 2 or 3.

colony's in level 1 are

agency outpost 1 (abandoned)
before it fell it was used to study the entities in the backrooms but since the agency put it to close to an area where a lot of entities in level 1 resides they had to abandon it.

18 agents 0 travelers

the rouges
a small group of rouge teens not open to trading and are known to raid agency outposts

1 agent ( a spy for the agency) 9 travelers

concrete bois
a group of people residing in level 1 friendly open for trading the leader is thought to be the person who made the actual backrooms wiki

2 agents 24 travelers