Flashing LED

Just started with Arduino, have purchased the Franzis-Verlag kit
with the UNO board.
The thing I have realized that the first program in the book is
to make the led "L" and the output pin 13 flash.
While connecting the board via USB I found that LED "L" flashes
without any program loaded.
Is that normal?

Yes it is normal. You can enjoy uploading your codes

Thanks :wink: