lights code

#define F_CPU 1000000UL

#include "avr/io.h"
#include "util/delay.h"
#include "avr/interrupt.h"

uint8_t brightness[3] = {5, 125, 250};
int dir [3] = {1,1,0}; //1 for up, 0 for down
uint8_t i;

int main(void)
{
    cli();

    DDRA |= 1<<DDA7;
    DDRA |= 1<<DDA6;
    DDRA |= 1<<DDA5; //pins 6,7,8 set to output

    //Set up PWM pin 6 (OC0B)
    TCCR0A |= 1<<COM0B1;
    TCCR0A |= 1<<WGM00;
    TCCR0A |= 1<<WGM01;
    TCCR0B |= 1<<CS00; //clk no prescaling
    OCR0B = brightness[0];

    //Set up PWM pin 7,8 (OC1A/OC1B)
    TCCR1A |= 1<<COM1A1;
    TCCR1A |= 1<<COM1B1;
    TCCR1A |= 1<<WGM10;
    TCCR1B |= 1<<WGM12;
    TCCR1B |= 1<<CS10;
    OCR1A = brightness[1];
    OCR1B = brightness[2];

    sei();

    while(1)
    {
        for(i = 0; i < 3; i++){
            if(brightness[i] >= 255){
                dir[i] = 0;
            } else if (brightness[i] <= 5){
                dir[i] = 1;
            }
            if(dir[i]){
                brightness[i] = brightness[i] + 5;
            } else {
                brightness[i] = brightness[i] - 5;
            }
        }

        OCR0B = brightness[0];
        OCR1A = brightness[1];
        OCR1B = brightness[2];

        _delay_ms(30);
    }
}