Project/Assets/ML-Agents/Examples/Hallway/Scripts/HallwaySettings.cs

using UnityEngine;

public class HallwaySettings : MonoBehaviour
{
    public float agentRunSpeed;
    public float agentRotationSpeed;
    public Material goalScoredMaterial; // when a goal is scored the ground will use this material for a few seconds.
    public Material failMaterial; // when fail, the ground will use this material for a few seconds.

}