var casper = require('casper').create({

       // pageSettings: {

        //    loadImages:  true,

        //    loadPlugins: false

       // },

        logLevel: "info",

        verbose: true

    });

    	var url='http://docs.casperjs.org/en/latest/modules/casper.html#eachthen';

var fs=require('fs');

var  index=0;

casper.userAgent('Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.109 Safari/537.36');

casper.start().repeat(5,function(){

	index++;

casper.open(url);

 this.wait(5000,function(){

           this.echo('wait 5s over!')

          });

casper.then(function() {

   fs.write('casper_'+index+'.html',this.getHTML(),'w');

});

});

casper.run();