Player is running just few seconds C#

Unity Engine
1

The player is running just few seconds,
How can i fix it? This is my player running code:

using UnityEngine;
using System.Collections;

public class Running : MonoBehaviour
{
public Animator animator;

public float rotSpeed = 90f;
public bool canRun = true;
public float r;

void Start ()
{
animator = GetComponent();
}

void Update ()
{

}

void FixedUpdate()
{

float h = Input.GetAxis (“Horizontal”);
float v = Input.GetAxis (“Vertical”);
r = Input.GetAxis (“Run”);

animator.SetFloat (“V Input”, v);
animator.SetFloat (“Turning”, h);
transform.Rotate(new Vector3(0, h * Time.deltaTime * rotSpeed, 0));

StartCoroutine (ProcessRun ());
}

IEnumerator ProcessRun()
{
if (r == 1 canRun == true)
{
animator.SetBool (“Running”, true);
yield return new WaitForSeconds(0);
animator.SetBool (“Running”, false);
canRun = false;
print (canRun);

}
else if (r == 0)
{
yield return new WaitForSeconds(0);
canRun = true;
}
}
}

2

When is “r” reset to 0?

3

“r” resets to 0 when you don’t hold the run key

4

You can lock this thread,I fixed the problem.