rabidus-test/Assets/Scripts/EnemyAI.cs

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

public class EnemyAI : MonoBehaviour
{
    [SerializeField]
    private float _sideTimeChangeInterval;
    [SerializeField]
    private float _randomOffset = 0.5f;

    private ShipMoveSides moveSides;
    private float newX = 10;

    private void Awake()
    {
        moveSides = GetComponent<ShipMoveSides>();
    }

    private void Start()
    {
        StartCoroutine(ChangeSide());
    }

    private IEnumerator ChangeSide()
    {
        while (true)
        {
            newX = Random.Range(-moveSides.Radius, moveSides.Radius);
            yield return new WaitForSeconds(_sideTimeChangeInterval + Random.Range(-_randomOffset, _randomOffset));
        }
    }

    private void Update()
    {
        moveSides.UpdateInput(Mathf.Clamp(transform.localPosition.x - newX, -1, 1));
    }
}