Unity : How to start a Coroutine -s to excute something in same thread and not block it?

EnemyMovement.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class EnemyMovement : MonoBehaviour
{
    [SerializeField] List<Waypoint> path;
    
    void Start()
    {
        print("A");
        StartCoroutine(FollowPath());
        print("B");
    }

    IEnumerator FollowPath()
    {
        print("Start petrol ...");
        foreach (Waypoint waypoint in path)
        {
            print("Visiting block : " + waypoint.name);
            transform.position = waypoint.transform.position;
            yield return new WaitForSeconds(1f);
        }
        print("Ending patrol");
    }
}