8.js

do {
	var next;
	var promise = new Promise(resolve => {
		next = resolve;
	});

    console.log('System Maintenance!')
    await sleep(3000)
    page.once('frameattached', ()=> {
    	next();
    });
    await page.reload();

	await promise;
} while(await mainFrame.title() == 'System Maintenance');