Run a command each time a touchscreen is touched Linux

main.sh

#!/bin/bash

DEVICE="/dev/input/event4" # Replace with your actual device
COMMAND="echo 'Touch detected'" # Replace with the command you want to run

sudo evtest "$DEVICE" | while read line; do
    if echo "$line" | grep -q "EV_KEY"; then # Adjust based on actual output for a touch event
        eval "$COMMAND"
    fi
done