JSON to Google Docs for Trello

I want to have all Trello data into a Google Docs sheet.
So I wrote this (and with copying snippets from here and there):

// Arnold P. Siboro
// August 2012

   
function myFunction() {
  //blabla
  throw 'Congratulations, you have successfully installed XXX ';
}
function onOpen() {
  var sheet = SpreadsheetApp.getActiveSheet();
  var lastRow = sheet.getLastRow();
  //sheet.setActiveCell()
 
  //var object = getJSONdata();
  var object = getTrelloJSONdata();
 
  sheet.clear();

 
  for (var i=0; i