Prevent script crash if player leaves

Help and Feedback Scripting Support
#1 
||||local Char_One = PLR_ONE.CharacterAdded:Wait()|
|---|---|---|---|
||||local Char_Two = PLR_TWO.CharacterAdded:Wait()|
||||--PLAYER LEFT, HOW TO SOLVE???|

???
it will infinitely wait for a char

#2
#3