For this you will need two devices. (one of them preferably a phone for size) On the smaller device set the code variable to something and hide it next to someone. (read notes and credits first!) On the other device, press the send sound button. Enter in the code. (the one on the smaller device) choose a sound. Zero or nothing to cancel. If you press enter, the other device should make the noise you have chosen. (Unless the cloud didn't work at that second...) You NEED to be a "scratcher" to use this. Community guidelines would like you to use different accounts for this.
ONLY ANNOY PEOPLE WHO ARE OKAY WITH BEING ANNOYED! AND DON'T SCARE PEOPLE! Results may vary... Tip: you may need to adjust the amount of time the screen stays awake in your devices' settings. Remember to change it back when you're done.