#include <avr/io.h>

// Function to create a delay
void delay(long int count) {
    while(count--) 
    {
        asm volatile ("nop");
    }
}

int main(void) {
    // Set PB0, PB1, PB2, PB3, PB4 as output
    DDRB |= (1 << PB0) | (1 << PB1) | (1 << PB2) | (1 << PB3) | (1 << PB4);

    while (1) {
        // Turn on LEDs
        PORTB |= (1 << PB0) | (1 << PB1) | (1 << PB2) | (1 << PB3) | (1 << PB4);
        delay(100000);

        // Turn off LEDs
        PORTB &= ~((1 << PB0) | (1 << PB1) | (1 << PB2) | (1 << PB3) | (1 << PB4));
        delay(100000);
    }

    return 0;
}