title: copy and paste with google spreadsheet script
body: <p>I would like to modify the script shown below, so that if re-run, it does not overwrite pre-existing data, but instead writes the rows under it.</p>
  
  <p>(I use the google spreadsheet)</p>
  
  <pre><code>moveValuesOnly fonction () {
  var ss = SpreadsheetApp.getActiveSpreadsheet ();
  var source = ss.getRange ("Sheet1 F1: H3 ');
  source.copyTo (ss.getRange ("Feuil2 A1! '), {contentsOnly: true});
  source.clear ();
  }
  </code></pre>