Iíve been trying to run a script in order to sync my google spreadsheet with my google calendar, however, I get the error message: Cannot find method createEvent(string,string,string,object). (line 15, file "Code")

The script that I entered is:
function caltest1() {
var sheet = SpreadsheetApp.getActiveSheet();
var startRow = 2;
var numRows = 199;
var dataRange = sheet.getRange(startRow, 1, numRows, 5);
var data = dataRange.getValues();
var cal = CalendarApp.getDefaultCalendar();
for (i in data) {
var row = data[i];
var title = row[2];
var desc = row[3];
var tstart = row[1];
var tstop = row[1];
var loc = row[3];
cal.createEvent(title, tstart, tstop, {description:desc,location:loc});

There is a total of 199 rows not including the header row. I have date/time in the first row, the event in the second, and the country where the event is taking place in the third column. Can you let me know how I can run this so it imports all the events into a google calendar I have created and updates automatically when new events are entered into the spreadsheet? The google spreadsheet was from an excel file I imported.