how to make a object move away from another object unity code example

Example 1: how to make an object move in unity

Vector3 input = new Vector3 (Input.GetAxis("Horizontal"), 0 , Input.GetAxis("Vertical");
Vector3 dir = input.normalized;
Vecotr3 vel = dir * speed * Time.deltaTime;

transform.Translate(vel);

Example 2: how to instantiate an object behind another object in unity

Instantiate( prefab, transform.position + ( transform.right * distance), transform.rotation );