ELI5: Explain Like I'm 5

5-1-5-0

Okay, so have you ever played a game where you count to five and then you do something? Like maybe you count to five and then you jump or spin around? Well, 5-1-5-0 is kind of like that game, but with numbers.

So first, you say the number 5. Then, you say the number 1. After that, you say the number 5 again. And finally, you say the number 0.

Now, this might seem like just a silly sequence of numbers, but sometimes people use it to help them remember things. For example, if you were learning how to be safe during a fire, someone might tell you to remember "5-1-5-0." And what they mean is that you should:

- 5: Call 911 to get help
- 1: Get out of the building (because it's safer to be outside during a fire)
- 5: You should have 5 meeting places, or different spots to meet up with your family in case there is an emergency in which you are separated
- 0: Check to make sure nobody is left behind inside the building

So that's what 5-1-5-0 means, it's just a sequence of numbers that can help people remember important safety information.