Starting, error CS1003: Syntax error, ',' expected

I`m starting in this word following a tutorial and some resourses to learn, and follow exactly and this appeard "
Assets\Scrips\coin.cs(7,31): error CS1003: Syntax error, ',' expected"

and this is my script
using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class coin : MonoBehaviour {

public static int coinscount : 0;


// Start is called before the first frame update
void Start() {
//Debug.Log ("Moneda Creada");
coin.coinscount++;
}

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

}

void OnTriggerEnter(Collider platerCollider) {
if (collider.compareTag("player")) {
Destroy (gameObject);
}

}



void OnDestroy(){
coin.coinsCount--;

if (coin.coinsCount <= 0) {
Debug.Log("El juego ha TERMINADO GANASTE!!!");

}
}
}





also it didn`t complete by him self like the tutorial, any suggestion is accepted, thank`s!

 

On line 7 replace

public static int coinscount : 0;

with

public static int coinscount = 0;

 

it works but give me other errors :c

 

thank´s