Enumerator error CS0103 the SpeedRoutine doesn't exist? Not sure why this doesnt work?

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class player : MonoBehaviour
{
public int Speed;
public int MaxSpeed;

// Start is called before the first frame update
void Start()
{
MaxSpeed = Random.Range(60, 120);
StartCoroutine(SpeedRoutine());
}
// Update is called once per frame
void Update()
{
IEnumerator SpeedRoutine()
{
while (true)
{
yield return new WaitForSeconds(1.0f);
Speed += 5;
if(Speed > MaxSpeed)
{
break;
}
}
}
}
}

 

You can not define your Corutine inside of your update function.