Circle.cs

Circle.cs

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

public class Circle : MonoBehaviour
{
    [SerializeField] private GameObject prefab;
    [SerializeField] private float radius = 2;
    [SerializeField] private float number = 1;
    private float t;
    IEnumerator Start()
    {
        while (t < 6.28f)
        {
            t += 6.28f / number;
            var x = Mathf.Sin(t)*radius;
            var z = Mathf.Cos(t)*radius;
            var spawn =Instantiate(prefab, new Vector3(x, 0, z), Quaternion.identity, transform);
            var lookAngle = Mathf.Atan2(x, z) * Mathf.Rad2Deg;
            spawn.transform.eulerAngles = Vector3.up * lookAngle;
            yield return null;        
        }
    }
}