added: simple scripts for object movement

Assets/SinMovement.cs

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+using UnityEngine;
+
+public class SinMovement : MonoBehaviour{
+    private float originalY;
+
+    public float speed;
+    public float scale;
+
+    public float offset;
+    
+    void Start(){
+        originalY = transform.position.y;
+        offset += Random.Range(-1, 1);
+    }
+
+    // Update is called once per frame
+    void Update(){
+        transform.position = transform.position.Flatten(null, originalY + Mathf.Sin((Time.time + offset) * speed) * scale, null);
+    }
+}

Assets/SinMovement.cs.meta

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+fileFormatVersion: 2
+guid: e33277577aa379a41a747f01aade9c96

Assets/SwayMovement.cs

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+using UnityEngine;
+
+public class SwayMovement : MonoBehaviour{
+    Vector3 originalRot;
+    public Vector3 swayAmount;
+    public Vector3 swaySpeed;
+
+    private Vector3 offset;
+    
+    void Start(){
+        originalRot = transform.rotation.eulerAngles;
+        offset = new Vector3(Random.Range(-5, 1), Random.Range(-1, 5), Random.Range(-3, 1));
+    }
+
+    // Update is called once per frame
+    void Update(){
+        Vector3 sway = new Vector3(
+            originalRot.x + Mathf.Sin((Time.time + offset.x) * swaySpeed.x) * swayAmount.x,
+            originalRot.y + Mathf.Sin((Time.time + offset.y) * swaySpeed.y) * swayAmount.y,
+            originalRot.z + Mathf.Sin((Time.time + offset.z) * swaySpeed.z) * swayAmount.z
+        );
+
+        transform.rotation = Quaternion.Euler(sway);
+    }
+}

Assets/SwayMovement.cs.meta

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+fileFormatVersion: 2
+guid: 57870c7b66535c74688188df7e771ce7