How to make two objects randomly move across the screen?

Question

Unity

How to make two objects on the screen (let them be fish) swim across the screen regardless of each other, in a chaotic direction (like aquarium fish)?

Answer 1

If chaotic, then each frame set random coordinates.
If smoothly, then each frame you add or subtract a random number from the jerk vector (this is r'''), and then integrate 3 times. The larger the derivative you change, the smoother the trajectory.
It can also move objects through randomly parameterized bezier curves.
And many more ways.