Unity2D Sprite Fading Issues

Hello!

I've posted a similar question before, with no answer, however I've improved coding-wise and have scratch coded this so far. My issue is that A. This function does the same fadeIn/Out regardless (I recognize the code is the same for both, I'm just not sure what to do to reverse it) and B. the FadeIn/Out variables aren't resetting back to false after they fade.

What am I doing wrong? using UnityEngine; using System.Collections;

 public class FadeIn : MonoBehaviour {
 
     public SpriteRenderer sprite;
     public float fade = 0f;
     public Color spriteColor = Color.white;
     public bool fadeIn = true;
     public bool fadeOut = false;
     private float startTime = 0.0f;
     public float fadeInTime = 1.5f;
     public float fadeOutTime = 1.5f;
 
     // Use this for initialization
     void OnTriggerEnter2D () {
         startTime = Time.time;
         fadeIn = true;
     }
 
     void OnTriggerExit2D () {
         startTime = Time.time;
         fadeOut = true;
     }
     
     // Update is called once per frame
     void Update () {
         if(fadeIn==true){
             print ("EnteringCar");
             fade = Mathf.Lerp(0f, 1f, (Time.time - startTime) / fadeInTime);
             spriteColor.a = fade;
             sprite.color = spriteColor;
 
         }
         if(fade > 1){
             fadeIn = false;
 
     }
         if(fadeOut==true){
             print ("ExitingCar");
             fade = Mathf.Lerp(0f, 1f, (Time.time - startTime) / fadeOutTime);
             spriteColor.a = fade;
             sprite.color = spriteColor;
 
         }
         if(fade < 1){
             fadeOut = false;
 
         }
 }
 }