function main() {
    var last_news = ''
    while(true){
        var html = HttpQuery('https://www.binance.com/en/support/announcement/c-49?navId=49')
        if(html){
            var news = html.match(/Launch .{0,40} Perpetual|Delist.{0,40}-\d{1,2}/i)
            if(news && last_news != news[0]){