How to Get Map Time and Distance using Google Apps Script

function getDirection() {
  
  // DECLARE SHEET
  var ss = SpreadsheetApp.getActiveSpreadsheet();
  var mapSheet = ss.getSheetByName("MAP");
  
  var start = mapSheet.getRange('B1').getValue();
  var end = mapSheet.getRange('B2').getValue();
  
  var directions = Maps.newDirectionFinder()
    .setOrigin(start)
    .setDestination(end)
    .setMode(Maps.DirectionFinder.Mode.DRIVING)
    .getDirections();
  
  //Logger.log(directions.routes[0].legs[0].duration.text);

  //CLEAR QUESTION AND ANSWER
  mapSheet.getRange('A6:D500').clear();
  
  //NEXT ROW ON MAP SHEET
  var nextRow = mapSheet.getLastRow() + 1;

  for (var i = 0; i < directions.routes[0].legs.length; i++) 
  {
    var endAddress = directions.routes[0].legs[i].end_address;
    var startAddress = directions.routes[0].legs[i].start_address;
    var distance = directions.routes[0].legs[i].distance.text;
    var duration = directions.routes[0].legs[i].duration.text;
    
    mapSheet.getRange(nextRow,1).setValue(startAddress);
    mapSheet.getRange(nextRow,2).setValue(endAddress);
    mapSheet.getRange(nextRow,3).setValue(distance);
    mapSheet.getRange(nextRow,4).setValue(duration);
    
    nextRow++;

  }
}