I’m trying to write a bash script that executes a command when an external monitor is connected/disconnected. This is what I’ve got so far (based on the answer here) but it’s not working, can anyone tell me what I’m doing wrong?

#!/bin/bash
while true
do

sleep 5

xrandr=$(xrandr)

con_monitors=$(echo $xrandr | grep -c " connected ")

    if [[ $con_monitors -gt 1 ]]; then
        gsettings reset org.gnome.desktop.interface text-scaling-factor
    else
        gsettings set org.gnome.desktop.interface text-scaling-factor 1.2
    fi
    
done