How can I make this platform only move when the player is standing on it.

I will start by saying I am a complete beginner. I followed a tutorial and got far enough to make my platform work technically, but it just keeps going up and down. I need it to not move until the player is on it. I’m hitting a lot of dead ends though so I thought I would ask for help in the mean time. This is what I have so far,

using UnityEngine;
using System.Collections;

public class MovingPlatform : MonoBehaviour {

	[SerializeField]
	Transform platform;

	[SerializeField]
	Transform startTransform;

	[SerializeField]
	Transform endTransform;

	Vector3 direction;
	Transform destination;


	void Start (){
		SetDestination (startTransform);
		}



	void FixedUpdate(){
				platform.rigidbody.MovePosition (platform.position + direction * platformSpeed * Time.fixedDeltaTime);

				if (Vector3.Distance (platform.position, destination.position) < platformSpeed * Time.fixedDeltaTime) {
						SetDestination (destination == startTransform ? endTransform : startTransform);
				}
		}

	void OnDrawGizmos(){
		Gizmos.color = Color.green;
		Gizmos.DrawWireCube (startTransform.position, platform.localScale);

		Gizmos.color = Color.red;
		Gizmos.DrawWireCube (endTransform.position, platform.localScale);
	}


	void SetDestination(Transform dest){
		destination = dest;
		direction = (destination.position -platform.position).normalized;
   }
		     

	




}

really any help is appreciated

You can give it a condition to check before it moves like:

public var isPlayerOn : boolean;

if (isPlayerOn) { 
     //Move
     }

And then you just check is the Player is on the platform. There’s a crapton of ways to do it but the simplest would be to check Collisions.

//Make sure your player is tagged Player
function OnCollisionEnter (col:Collision) {

     if (col.gameObject.tag == "Player") {
           isPlayerOn = true;
     }

}

function OnCollisionExit (col:Collision) {

     if (col.gameObject.tag == "Player") {
           isPlayerOn = false;
     }

}

Pretty simple but it should get you started.