LED blink code for AVR

main.c

#include <avr/io.h>

#define F_CPU 8000000UL //8MHz
#include <util/delay.h>

int main(void){
    DDRC = 0x02; // C1 to output
    CLKPR = (1 << CLKPCE); // Enable clock change
    CLKPR = 0; // 0 to 1-div clock (max speed = 8MHz)
    for(;;){

        if (PORTC & 0x02){
            PORTC &= ~0x02;
        }else{
            PORTC |= 0x02;
        }

        _delay_ms(1000);
    }
}