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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);