Help me with a bootloader for my arduino S3v3

Hello comunity, today i just finished to work at my arduino s3v3, and i need a bootloader, i finded on network a scheme for an universal AVR programmer, but i don't know what bootloader use for arduino s3v3.
Photo of arduino:

16 MHz xtal, use Uno bootloader.

Give me a download link, please.

It's one of the files included in the IDE.
Select:Tools:Programmer:your programmer
Select Tools:Board:Uno
Select Tools:Burn Bootloader.

Thank for response.
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