Feature Request: Make it easier to use a random effect.

[emmceemoore]

I like all of the effects and think it would be cool if I could randomly get a different effect each time I run the command. (Currently, I find myself running the command without any arguments, scanning through the various effects to find one I haven't used in a while, and then running the command again with an effect specified to achieve this. 😅)

A couple ideas come to mind:

• Don't require an effect to be specified--use a random one by default.
• Introduce some sort of "--random-effect" option that, when specified, randomly selects an effect to use.

Thanks for sharing this fun tool! 😁