Set fire to all mobs in a radius of 5 blocks [SOLVED]

I wanted to do something similar recently, but couldn't find any way to do it with just one procedure. What I first did was made a command (I made it /ignite) that sets the person who does it on fire for 15 seconds. Then, I made a procedure that ran the command "/execute @e[type=!player,rm=5] ~ ~ ~ ignite". The only issue with this is that this will not set other players on fire, however it will set all other living entities within 5 blocks on fire.

I've been using commands in my code for a long time now (I'm much more of a command blocker then a mod maker, tbh I'm just using MCreator out of necessity), and I can guarantee that nothing will pop up, and it will work in survival no cheats. All of it is done backend, and the commands it runs won't even pop up in a server console. The only time you will ever see anything from running a command built into a procedure is if you are using something like /tellraw, where the entire objective is to make text.

Hey, hope this is something you can use.

For each entity as Entity iterator at X: X position of event/target entity Y: Y position of event/target entity Z: Z position of event/target entity in a square cube with size 5.

DO IF not is event/target entity the same entity as entity iterator

      DO set entity iterator on fire for 15 seconds (or how ever long you want it to last.)

this is just the effect. you would have to figure out how to use it