yichael_smartbow/Assets/BowArrow/Scripts/Effect/HitTargetNumber.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using DG.Tweening;

public class HitTargetNumber : MonoBehaviour
{
    void Start()
    {
        this.transform.localScale = Vector3.zero;
        RectTransform rtf = this.transform.GetComponent<Image>().rectTransform;
        Sequence seq = DOTween.Sequence();
        Tween t1 = rtf.DOScale(new Vector3(1.1f, 1.1f ,0), 0.3f);
        seq.Append(t1);
        Tween t2 = rtf.DOScale(new Vector3(0.9f, 0.9f, 0), 1f);
        seq.Append(t2);
        Tween t3 = rtf.DOScale(Vector3.zero, 0.3f);
        seq.Append(t3);
        seq.AppendCallback(delegate() {
            Destroy(this.gameObject);
        });
    }

    public static void Create(int number) {
        GameObject o = GameObject.Instantiate(
            Resources.Load<GameObject>("Prefabs/Effects/HitTargetNumber"),
            Vector3.zero,
            Quaternion.identity,
            GameObject.Find("Canvas").transform
        );
        o.transform.localPosition = new Vector3(340, 180, 0);
        o.GetComponentInChildren<Text>().text = number.ToString();
    }
}