FlipFlop.cs

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using System;
using UnityEngine.Events;
 
namespace UnityEngine
{
    [Serializable]
    public class FlipFlop
    {
        [Tooltip("A set of events to execute together")]
        [SerializeField] public UnityEvent firstEvent;
        [Tooltip("A set of events to execute together")]
        [SerializeField] public UnityEvent secondEvent;
        [NonSerialized] private UnityEvent nextEvent = null;
 
        public FlipFlop(UnityAction firstAction, UnityAction secondAction)
        {
            UnityEvent firstEventConstructor = new UnityEvent();
            firstEventConstructor.AddListener(firstAction);
            
            UnityEvent secondEventConstructor = new UnityEvent();
            secondEventConstructor.AddListener(secondAction);
 
            this.firstEvent = firstEventConstructor;
            this.secondEvent = secondEventConstructor;
        }
        
        public FlipFlop(UnityEvent firstEvent, UnityEvent secondEvent)
        {
            this.firstEvent = firstEvent;
            this.secondEvent = secondEvent;
        }
 
        public void Invoke()
        {
            nextEvent ??= firstEvent;
 
            nextEvent?.Invoke();
            
            if (nextEvent == firstEvent)
                nextEvent = secondEvent;
            else
                nextEvent = firstEvent;
        }
        
    }
    
}