pulls data from YQL and puts in a spreadsheet

pullData.js

function pullData() {
 //select * from yahoo.finance.quote where symbol in ("YHOO","AAPL","GOOG","MSFT")
 var url="http://query.yahooapis.com/v1/public/yql?q=select%20*%20from%20yahoo.finance.quote%20where%20symbol%20in%20(%22YHOO%22%2C%22AAPL%22%2C%22GOOG%22%2C%22MSFT%22)&format=json&diagnostics=true&env=store%3A%2F%2Fdatatables.org%2Falltableswithkeys";
 var response = UrlFetchApp.fetch(url);
 var json=JSON.parse(response.getContentText());
 var ss = SpreadsheetApp.getActiveSpreadsheet();
 var sheet = ss.getSheets()[0];
 var quotes=json.query.results.quote;
  for(var i=0;i<quotes.length;i++){
        col=i+1;
        sheet.getRange('a'+col).setValue(quotes[i].Name);
        sheet.getRange('b'+col).setValue(quotes[i].LastTradePriceOnly);
  }

}