Pencilline.cs

using UnityEngine;
using System.Collections;

public class Pencilline : MonoBehaviour
{

    //public float explodeRadius = 1f;

    //to refer to our prefab pencilline
    public GameObject obj;

    float lastx = 0f;
    // Use this for initialization
    void Start()
    {

    }

    // Update is called once per frame
    void Update()
    {

        //if we have moved far enough make a new pencilline
        /*Collider2D[] colliders = Physics2D.OverlapCircleAll(transform.position, explodeRadius);
        foreach (Collider2D col in colliders)
        {
            col.isTrigger = false;
        }
        */
            if (transform.position.x > (lastx + 0.02f))
            {
            
            Instantiate(obj, transform.position, Quaternion.identity);
            lastx = transform.position.x;

            lastx = transform.position.x;

            }

    }
}

This script is attached to a pencilline object, which is duplicated in the game in order to create a platform for the players to walk on.