Light sweeping across the stage

I have four movers (elation davinci) and I’d like to create a simple effect for them to just move from one spot (home/straight down) on the stage to another spot on the stage and then back to their original position. And then to do this over and over until I turn the effect off. We are doing a production of joseph and the amazing technicolor Dreamcoat, so I need the effect to keep running as we change cues during the song to make the stage a different color for each color in his coat. I’d also want the movers to change colors. 

Can anyone help me with how to create this effect? Thank you! 

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