Question Input and collision

Can someone please help me with this? This is a script which does that when the rotating object collides with a obstacle it changes direction and when it collides with another obstacle it changes direction back, I know it could be done better but i try to do it only from my knowledge, without tutorials and realy dont know how to fix it.


using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class RotatingObject : MonoBehaviour
{
public Transform target;
public float speed;
public GameObject Obstacle1, Obstacle2;
bool InTrigger = true;
bool InTrigger2 = true;
private Vector3 zAxis = new Vector3(0, 0, 1);

void Start()
{

}
void Update()
{
if (Input.GetKeyDown(KeyCode.E) && InTrigger)
{
speed = -3;
Debug.Log("Pes");
}
if (Input.GetKeyDown(KeyCode.E) && InTrigger2)
{
speed = 3;
Debug.Log("Kocka");
}
}

void FixedUpdate()
{
transform.RotateAround(target.position, zAxis, speed);

}
void OnTriggerStay2D(Collider2D col)
{
if (col.gameObject.tag == "Obstacle1")
{

Debug.Log("Collision");
Obstacle1.SetActive(false);
Obstacle2.SetActive(true);
InTrigger = true;
}
if (col.gameObject.tag == "Obstacle2")
{

Debug.Log("Collision");
Obstacle2.SetActive(false);
InTrigger2 = true;

}



}
}