map.js

async function processPens(pens) {
  for (let pen of pens) {
    await processPen(pen);
  }
}
    
async function processPen(pen) {
  await page.goto(url);
  await page.waitForSelector(FORK_SELECTOR);
  await page.click(FORK_SELECTOR);
  await page.waitForNavigation();
  return page.url();
}