I have 14 assembly lines and an LED display with a siren looking light and a list of 18 tunes. There are 3 cells (each cell is 4-5 assembly lines), and there needs to be one song for each cell. When an assembly line in a particular cell goes down, then a specific tune is supposed to go off while the siren light flashes. My problem is is an assembly line in cell 1 goes down and then a line in cell 2 goes down, I need to have 1 song for cell 1 to go off for 8 seconds, then when thats done I need a song to go off for cell 2 for 8 seconds. How do I prioritize where if another cell is activated, the 2nd cell's song will wait for the first cells song to go 8 seconds, then play? Send me an email if my question is confusing.