Mario like skid when moving in oppsite direction for 2d platformer

Been trying to figure this out for hours please help heres my movement code

 void FixedUpdate()
 {
 var movement = Input.GetAxisRaw("Horizontal");
 transform.position += new Vector3(movement, 0, 0) * Time.deltaTime * movspeed;
 anim.SetBool("walking", movement != 0);
 
 }