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Assets/Free 2D Cartoon Parallax Background/Demo/Script/ParallaxBackground_0.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class ParallaxBackground_0 : MonoBehaviour
+{
+    [Header("Layer Setting")]
+    public float[] Layer_Speed = new float[7];
+    public GameObject[] Layer_Objects = new GameObject[7];
+
+    private Transform _camera;
+    // private float[] startPos = new float[7];
+    private float boundSizeX;
+    private float sizeX;
+    private GameObject Layer_0;
+    public float SwitchPos = 40;
+    public float SpeedMultiplier = -1;
+    float startX;
+    void Start()
+    {
+        _camera = Camera.main.transform;
+        sizeX = Layer_Objects[0].transform.localScale.x;
+        boundSizeX = Layer_Objects[0].GetComponent<SpriteRenderer>().sprite.bounds.size.x;
+        startX = lastCamX = _camera.position.x;
+
+        // for (int i=0;i<5;i++){
+        //     startPos[i] = _camera.position.x;
+        // }
+    }
+    float lastCamX;
+    void Update(){
+        float camDif = _camera.position.x - lastCamX;
+        // Debug.Log(camDif);
+        lastCamX = _camera.position.x;
+        for (int i=0;i<5;i++){
+            // float temp = (_camera.position.x * (1-Layer_Speed[i]) );
+            // float distance = _camera.position.x  * Layer_Speed[i] ;
+
+            Layer_Objects[i].transform.position += new Vector3(Layer_Speed[i] * camDif * SpeedMultiplier,0);
+            if(Layer_Objects[i].transform.localPosition.x >= SwitchPos || Layer_Objects[i].transform.localPosition.x <= -SwitchPos){
+                Layer_Objects[i].transform.localPosition = new Vector3(0,0,10);
+            }
+            // Layer_Objects[i].transform.position = new Vector2 (startPos[i] + distance, _camera.position.y);
+            // if (temp > startPos[i] + boundSizeX*sizeX){
+            //     startPos[i] += boundSizeX*sizeX;
+            // }else if(temp < startPos[i] - boundSizeX*sizeX){
+            //     startPos[i] -= boundSizeX*sizeX;
+            // }
+            
+        }
+    }
+}