using two ultrasonic sensors to control one light

I am making an art piece that has an led in it and it needs to be triggered by 2 ultra sonic sensors on either side of it. I am using a standard ultra sonic sensor that has a vcc pin, a trigger pin, a echo pin, and a ground pin. I have no clue how to make a program that uses these sensors. I just need 2 ultra sonic sensors that can be set at a certain distance to be triggered so that they can turn on a light inside of my piece. Both sensors do NOT have to be on at the same time to trigger it. Please help.

I need some sort of source code for the Hc-sr04 module which is the ultrasonic sensor

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