PingPong returns a value that will increment and decrement between the value 0 and length.
PingPong requires the value t to be a self-incrementing value, for example Time.time, and Time.unscaledTime.
using UnityEngine;
public class PingPongExample : MonoBehaviour { Light myLight;
void Start() { myLight = GetComponent<Light>(); }
void Update() { myLight.intensity = Mathf.PingPong(Time.time, 8); } }
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