Arduino breadboard

I have atmega328pu setup on a breadboard. I have uplaoaded blink sketch to it. In the blink sketch its 1000ms but the led blinks every 15seconds.. what am i doing wrong here... Thanks if anyone could help...

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How do i do that.. just burn bootloader.. or do i have to do anything else.. thanks if you can explain or guide me to a tutorial.. thanks for the quick reply

I have fixed it.. just had to click "burn bootloader" .. thank you very much.. :slight_smile: :slight_smile: