javascript - cycling click

    var productTabs = document.getElementById('products');
    var tabs = productTabs.querySelectorAll('li');
    var l = tabs.length
    var delay = 5000
    var i = 0

    function cycle() {
      setTimeout(function() {
        tabs[i].firstElementChild.click();
        i++;
        if (i==l) {
          i = 0;
        };
        cycle();
      }, delay)
    };
    cycle();