Clock Component with State

import React, { Component } from 'react';

class Clock extends React.Component {

 constructor(props) {
   super(props);
   const currentTime = new Date()
   this.state = {
     hours: currentTime.getHours(),
     minutes: currentTime.getMinutes(),
     seconds: currentTime.getSeconds(),
     ampm: currentTime.getHours() >= 12 ? 'pm': 'am'
   };
   this.setTimer();
 }
 setTimer() {
   //will run for 1 second and then call updateClock
   setTimeout(this.updateClock.bind(this), 1000);
 }
 updateClock() {
   //After one second it will update the Clock by one second
 }

  render() {
    const {hours, minutes, seconds, ampm} = this.state;

    return(
      <div className="clock"> {
        hours == 0 ? 12: (hours > 12) ?
          hours - 12: hours
      }:
      {
        minutes > 9 ? minutes: `0${minutes}`
      }:
      {
        seconds > 0 ? seconds: `0${seconds}`
      }
      {ampm}
    </div>
    )
  }
}

export default Clock;