Create a 3D object which is a 4:3 plane. When you create a map on the object, assign a 4:3 rectangle above the X axis to one side of the plane. Assign a 4:3 rectangle below the X axis to the other side.
Use the VFX to assign another mix to the layer.
In the alternate mix, assign 2 layers and position a Y offset to each to put them above an below the X axis respectively.
Then just set the Y rotate to spin and you have your effect.
If you make these mix assignments as presets then you can even use a DMX preset trigger with very little headache.
What's better is that you can make as many of these as you can by replicating the process.