Before/ ago!

[Mirch_Masala]

Which fits best in the following sentence and if possible please tell me also why?

1. That was a very scary moment for me when I didn’t find a lizard on my room’s wall which I saw two seconds before?

2. That was a very scary moment for me when I didn’t find a lizard on my room’s wall which I saw two seconds ago?

Thanks in advance!

Regards

Mirch.

[Beeesneees]

2. works best. If you were to say ‘before’ you would have to have an indication of what it came before.

[Mirch_Masala]

Thanks!