About Making customer marker in Google Map problem

[CLPintern03]

I am trying to make an extension to add a custom marker into google map (using icon instead of pin). After reading the google instruction [1], I try to make the extension by Appy Builder but fail with about 10 errors. How to debug the errors? I have tried quite a lot of times but still fail. I put a similar code into JSFiddle and it is successful.

[1] Customizing a Google Map: Custom Markers  |  Maps JavaScript API

[_FTTX (Ali Abo Wardi 0 iraq)]

There is a special extension for that. Look in the community