PipeManager.cs

using System.Collections.Generic;
using UnityEngine;
using UnityEngine.ProBuilder;

namespace PipeDreams
{
	public class PipeManager : MonoBehaviour
	{
		public float extrudeSpeed = 1f;
		public float minExtrudeDistance = 2f;
		public float maxExtrudeDistance = 20f;

		static List<Pipe> s_Pipes = new List<Pipe>();

		void Start()
		{
			ProBuilderMesh mesh = ShapeGenerator.CreateShape(ShapeType.Cube);
			Pipe pipe = mesh.gameObject.AddComponent<Pipe>();
			s_Pipes.Add(pipe);
			pipe.Begin(extrudeSpeed, minExtrudeDistance, maxExtrudeDistance);
		}
	}
}