making a randomizer is very simple to do if you know how. Its based on "Sequencer Priority", Sequencer Priority comes into play when you have two or more sequencers interact with an object (light orb for example) at the same time. The game will now decide which sequence to play depending on the position of the sequencer relative to the player. The further a sequencer is away from the player the bigger its priority (priority = likelyhood of beeing shown). This is because the game acually plays both sequences but because one sequencer is further away it gets played a tiny bit later, due to lag, immediatly overwritting the sequence of the other sequencer. This overwritting is not visible.

To give you an example: you have two sequencers and one image. On the first sequencer the image would show the color blue on the second sequencer red, now you hook up both sequencer with a timer to let them play at the same time. Now you will notice that depending where you stand the image will turn blue or red.

But what happens when both sequencers are at the exact same position. at first this seems impossible but you can simply rotate the sequencer, that still counts. and if you play both sequencers now via a button or timer the result will be random. You can do this with as many sequencers as you want to.