```javascript
function autoFillForm() {
var form = FormApp.openById('ID_Form_google');
var formItems = form.getItems();
var data = getDataFromDatabase(); // mengambil data dari sumber data eksternal

for (var j = 0; j < data.length; j++) {
var response = form.createResponse();

for (var i = 0; i < formItems.length; i++) {
var item = formItems[i];

switch (item.getType()) {
case FormApp.ItemType.TEXT:
var itemResponse = item.asTextItem().createResponse(data[j].text);
break;
case FormApp.ItemType.MULTIPLE_CHOICE:
var itemResponse = item.asMultipleChoiceItem().createResponse(data[j].choice);
break;
// tambahkan case untuk tiap jenis item yang ada di form
}

response.withItemResponse(itemResponse);
}

response.submit();
}
}
```