Button included as gameObject, perform action when pressed

I'm currently working on a thing for Android and therefore I need to use buttons in order to move the users. Currently I have this script:

 using UnityEngine;
 using System.Collections;
 using UnityEngine.UI;
 using UnityEngine.EventSystems;
 
 public class Movement : MonoBehaviour {
     public GameObject GasPedal;
     public GameObject BrakePedal;
     public GameObject LeftArrow;
     public GameObject RightArrow;
     int movementSpeed = 200;
     void Update () {
         if (--------) {
             transform.Translate (Vector3.forward * Time.deltaTime * (movementSpeed / 100));
         }
     }
 }

I'm not sure if I'm doing this right, but I need to have something on -------- that says something like GameObject GasPedal is being pressed

Thanks in forward