The wolf staring at the rabbit means that the tangent of the wolf curve points to the rabbit everywhere, so to use differential equations (mathematical modeling should be able to differentiate equations), the idea upstairs is too simple. I probably said it, I don't know if it's right, but there should be no problem with my thinking.

It is natural to establish the system with O-point, and set the curve equation f(x). At time t, there should be an equation as shown in the figure below.

The special plants in the back are miscalculated. Do it yourself