Why does the 3d model not move around the scene and how to fix it?

Question

JavaScript

Good day, I'm trying to make a 3d model move using this code:

var xpos = 8, maxPos = -200, start = 200; 
            const newPosition = object.position.x - xpos; //object это три д модель 
          
            if (newPosition < maxPos) {
              object.position.x = start;
            }
            else {
              object.position.x = newPosition;
            }

Please tell me what I'm doing wrong and how to fix it?