#include <avr/io.h>
#include <avr/interrupt.h>
volatile static int r=10,g=998,b=998;
volatile static char rgb=0;



ISR(TIM0_COMPB_vect){
char hi=2;
int low=998;
char x1,x2,x3,x4,x5,x6,x7,x8;
static char f;

switch(rgb){

case 0:
PORTB |=_BV(0);
if((50 < ADCL) != (ADCL < 150)){
if(100 < ADCL){x1=4;x2=5;x3=1;x4=2;}
else          {x1=1;x2=0;x3=4;x4=3;}
if(f==x1){
if(r > hi) r--;
if(r==hi) f=x2;
}
if(f==x3){
if(r < low) r++;
if(r==low) f=x4;
}
}
break;


case 1:
PORTB |=_BV(1);
if((50 < ADCL) != (ADCL < 150)){
if(100 < ADCL){x1=0;x2=1;x3=3;x4=4;x5=4;x6=5;x7=5;x8=6;}
else          {x1=3;x2=2;x3=0;x4=6;x5=5;x6=4;x7=4;x8=3;}
if(f==x1 || f==x5){
if(g > hi) g--;
if(g==hi){if(f==x1) f=x2;  else f=x6;}
}
if(f==x3 || f==x7){
if(g < low) g++;
if(g==low){if(f==x3) f=x4; else f=x8;}
}
}
break;


case 2:
PORTB |=_BV(2);
if((50 < ADCL) != (ADCL < 150)){
if(100 < ADCL){x1=2;x2=3;x3=6;x4=0;}
else          {x1=6;x2=5;x3=2;x4=1;}

if(f==x1){
if(b > hi) b--;
if(b==hi) f=x2;
}
if(f==x3){
if(b < low) b++;
if(b==low) f=x4;
}
}
break;
}


rgb++;
if(rgb >= 3) rgb=0;


}

///////////////////////////////////////
///////////////////////////////////////

ISR(TIM0_COMPA_vect){

PORTB= (0xF8 & 0xF8);

switch(rgb){
case 0:
OCR0B =r;
break;
case 1:
OCR0B =g;
break;
case 2:
OCR0B =b;
break;
}

TCCR0B = 0x00;
TCNT0 = 0;
TCCR0B = 0x01;

}
///////////////////////////////////////////
///////////////////////////////////////////

int main(){


DDRB = 0b11110111;
PORTB =0b00000111;

TCCR0A = 0x00;
OCR0A = 1000;

TIMSK0 = 0x06;

ADMUX = 0b00000011;
ADCSRA = 0b10000101;

sei();                  
TCCR0B = 0x01;

while(1){

ADCSRA = ADCSRA | 0b01000000;
while(ADCSRA & 0b01000000);

	}
return 0;
}