I am looking for ideas to set up an emergency horn at our plant. We used to have a person physically blast a steam whistle for emergencies and want to replace that with an electronic horn in multiple locations. The number of times the horn blasts will mean different events are happening. For example, 1 blast is a test, 2 is seek shelter, and 3 is head to designated location. I am making a graphic with 3 buttons to activate those functions but I am not quite sure the best way to press a button and get multiple blast of the horn. Has anyone done anything like this before or have any ideas to do this?