How to exit the script on Esc?

Question

bash

We have a script that rotates the display of random pictures and quotes in a cycle with an interval of 5 seconds.
How to end it with a single button press, without taking up an extra HOTKEY under the killall script, (preferably by Esc )
you need something a la an event handler in JS, i.e. if the script works and the treasured button was pressed, then we kill

Answer 1

I do this to myself, this is what is spinning in the cycle, and by pressing any button, the process is interrupted.

if read -r -n 1 -t 5 -p ""; then
    echo "Process was cancel"
    break
fi

Answer 2

Something like
while true; do
read input
if ["$input" = "a"]; then
echo "hello world"
fi
done