Zorgios

Header add Access-Control-Allow-Origin "https://test.com"
Header add Access-Control-Allow-Headers "origin, x-requested-with, content-type"
Header add Access-Control-Allow-Methods "PUT, GET, POST, DELETE, OPTIONS"

let firstTimer;
let secondTimer;
function firstTimer_func(){
  console.log('Сработал первый таймер.');
  i = Math.floor(Math.random() * 2);
  console.log(i);
  if(i==0){
    clearInterval(firstTimer);
    startSecondTimer();
  }
}
function secondTimer_func(){
  console.log('Сработал второй таймер.');
  i = Math.floor(Math.random() * 2);
  console.log(i);
  if(i==1){
    clearInterval(secondTimer);
    startFirstTimer();
  }
}
  
function startFirstTimer(){
	firstTimer=setInterval(firstTimer_func,5000); 
}

function startSecondTimer(){ 
	secondTimer=setInterval(secondTimer_func,5000); 
}

startFirstTimer();