Switch scenes randomly
First create macros for each scene you want to randomly switch to.
These macros will not require any conditions as they will be executed by another macros.
The actions list should consist of a scene switch action and a wait action, similar to the following:
Note that you can create a copy of macros by right clicking on the macro you want to copy.
Once you have created all these scene switch macros you will have to create one final macro which will execute the scene switch macros in a random order.
To do so first set up the conditions to your requirements. (In this example we will continuously run this macro so the "Plugin state" condition is chosen)
Add a new action of type "Random" (1) to the action list of this macro.
Next add each of the previously created scene switch macros to the Random action by pressing the plus button (2).
This macro will now continuously execute the scene switch macros in a Random order.
To not interfere with other macros you might have created it might be a good idea to mark this macro to run in parallel to other macros (3).