start scene 구현

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.UI;
+using UnityEngine.EventSystems;
+
+public class ClickExercise : MonoBehaviour
+{
+    RawImage btnImage;
+    RawImage btnImage2;
+    GameObject btnParent; //버튼들의 부모
+
+    private void Start()
+    {
+        btnParent = GameObject.Find("BtnGroup").gameObject; // "부모의 이름"으로 찾습니다.
+    }
+
+    public void GetBtn()
+    {
+        GameObject tempBtn = EventSystem.current.currentSelectedGameObject;
+        btnImage = tempBtn.GetComponent<RawImage>(); // 해당 오브젝트의 image 컴포넌트를 받음
+
+        int btnLength = btnParent.transform.childCount; // 자식의 갯수를 파악
+        Debug.Log(btnLength);
+        for (int i = 0; i < btnLength; i++) // 자식의 갯수 만큼 i++ 실행
+        {
+            //transfrom.Getchild(i)를 통해 버튼을 하나씩 색인
+            GameObject tempBtns = btnParent.transform.GetChild(i).gameObject; // 해당 버튼 이미지 컴포넌트를 불러온 후 변경
+            btnImage2 = tempBtns.GetComponent<RawImage>();
+            if (tempBtns.name == "Squat")
+            {
+                btnImage2.texture = Resources.Load("Squat_off", typeof(Texture2D)) as Texture2D;
+            }
+            else if (tempBtns.name == "Lunge")
+            {
+                btnImage2.texture = Resources.Load("Lunge_off", typeof(Texture2D)) as Texture2D;
+            }
+            else if (tempBtns.name == "SideHiKick")
+            {
+                btnImage2.texture = Resources.Load("SideHiKick_off", typeof(Texture2D)) as Texture2D;
+            }
+            //Debug.Log(tempBtns);
+        }
+
+        if (btnImage.name == "Squat")
+        {
+            btnImage.texture = Resources.Load("Squat_on", typeof(Texture2D)) as Texture2D;
+        }
+        else if (btnImage.name == "Lunge")
+        {
+            btnImage.texture = Resources.Load("Lunge_on", typeof(Texture2D)) as Texture2D;
+        }
+        else if (btnImage.name == "SideHiKick")
+        {
+            btnImage.texture = Resources.Load("SideHiKick_on", typeof(Texture2D)) as Texture2D;
+        }
+    }
+}

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