Major_Project_A/Assets/Scripts/Traps/CubeWithCrystals.cs

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

public class CubeWithCrystals : ActiveBlock
{
    public GameObject crystals;

    public override int GetInitative()
    {
        return 3;
    }

    public override IEnumerator OnRoundEnd(PlayerData[] allPlayers)
    {
        StartCoroutine(GrowCoroutine());
        yield return new WaitForSeconds(1.0f);
        StartCoroutine(ShrinkCoroutine());
        isFinished = true;
        //yield break;
    }

    IEnumerator GrowCoroutine()
    {
        float elapsedTime = 0;
        Vector3 startPosition = crystals.transform.position;
        Vector3 endPosition = new Vector3(crystals.transform.position.x, crystals.transform.position.y + 1.0f, crystals.transform.position.z);
        float time = 0.8f;
        while (elapsedTime < time)
        {
            transform.position = Vector3.Lerp(startPosition, endPosition, (elapsedTime / time));
            yield return new WaitForEndOfFrame();
            elapsedTime += Time.deltaTime;
        }
        crystals.transform.position = endPosition;
    }

    IEnumerator ShrinkCoroutine()
    {
        float elapsedTime = 0;
        Vector3 startPosition = crystals.transform.position;
        Vector3 endPosition = new Vector3(crystals.transform.position.x, crystals.transform.position.y - 1.0f, crystals.transform.position.z);
        float time = 0.8f;
        while (elapsedTime < time)
        {
            transform.position = Vector3.Lerp(startPosition, endPosition, (elapsedTime / time));
            yield return new WaitForEndOfFrame();
            elapsedTime += Time.deltaTime;
        }
        crystals.transform.position = endPosition;
    }
}