const cron = require("node-cron");

let queue = getItems();
console.log("Queued", queue);

function getItems() {
  return Array(10).fill(0).map(i => Math.floor(Math.random() * 100))
}

cron.schedule("* * * * *", () => {
  queue = getItems();
  console.log("Queued", queue);
});

cron.schedule("*/5 * * * * *", () => {
  item = queue.splice(0, 1);
  console.log("Executing", item);
});