Unity Statechart (two actors)

Trigger1.cs

using Assets;
using UnityEngine;
using UnityEngine.EventSystems;

public class Trigger1: MonoBehaviour
{
    private GameObject target;
    private bool triggerState;

    void Start()
    {
        target = GameObject.Find("Actor1");
        triggerState = false; // initial trigger state
    }

    void OnMouseDown() // toggle switch
    {
        if (triggerState == false)
        {
            triggerState = true;
            ExecuteEvents.Execute<ISignal>(target, null, (x, y) => x.OnSignal());
        }
        else
        {
            triggerState = false;
            ExecuteEvents.Execute<ISignal>(target, null, (x, y) => x.OffSignal());
        }
    }
}


Trigger2.cs

using Assets;
using UnityEngine;
using UnityEngine.EventSystems;

public class Trigger2 : MonoBehaviour
{
    private GameObject target;
    private bool triggerState;

    void Start()
    {
        target = GameObject.Find("Actor2");
        triggerState = false; // initial trigger state
    }

    void OnMouseDown() // toggle switch
    {
        if (triggerState == false)
        {
            triggerState = true;
            ExecuteEvents.Execute<ISignal>(target, null, (x, y) => x.OnSignal());
        }
        else
        {
            triggerState = false;
            ExecuteEvents.Execute<ISignal>(target, null, (x, y) => x.OffSignal());
        }
    }
}

ISignal.cs

using UnityEngine.EventSystems;

namespace Assets
{
    public interface ISignal: IEventSystemHandler
    {
        void OnSignal();
        void OffSignal();
    }
}

IState.cs

using UnityEngine.EventSystems;

namespace Assets
{
    public interface IState: IEventSystemHandler
    {
        void OnState();
        void OffState();
    }
}

Actor1.cs

using UnityEngine;
using UnityEngine.EventSystems;

namespace Assets
{
    public class Actor1 : MonoBehaviour, ISignal, IState
    {
        private GameObject subSystem;
        public bool state { get; set; }

        void Start()
        {
            subSystem = GameObject.Find("Actor2");
            {
                state = false;  // inital state
                gameObject.GetComponent<Renderer>().material.color = Color.yellow; //inital output
            }
        }

        public void OnSignal()
        {
            OnState();
        }

        public void OffSignal()
        {
            OffState();
        }

        public void OnState()
        {
            state = true;
            gameObject.GetComponent<Renderer>().material.color = Color.red;
        }

        public void OffState()
        {
            gameObject.GetComponent<Renderer>().material.color = Color.yellow;
            state = false;
            ExecuteEvents.Execute<IState>(subSystem, null, (x, y) => x.OffState());
        }
    }
}

Actor2.cs

using UnityEngine;

namespace Assets
{
    class Actor2 : MonoBehaviour, ISignal, IState
    {

        public GameObject superSystem;
        public bool state { get; set; }

        void Start()
        {
            superSystem = GameObject.Find("Actor1");
            state = false;  // inital state
            gameObject.GetComponent<Renderer>().material.color = Color.blue; //inital output
        }

        public void OnSignal()
        {
            if (superSystem.GetComponent<Actor1>().state == true)
            {
                OnState();
            }
        }

        public void OffSignal()
        {
            OffState();
        }

        public void OnState()
        {
            state = true;
            gameObject.GetComponent<Renderer>().material.color = Color.green;
        }

        public void OffState()
        {
            gameObject.GetComponent<Renderer>().material.color = Color.blue;
            state = false;
        }
    }
}