Fan speed controlled by light

#define F_CPU 16000000
#include <avr/io.h>
#include <util/delay.h>
#include <avr/interrupt.h>
#define MOTOR PB2
#define led0 PD0
#define led1 PD1
#define led2 PD2
#define led3 PD3
#define led4 PD4
#define led5 PD5
#define led6 PD6
#define led7 PD7
#define DTOA PC2
#define MOTOR PB3

volatile unsigned int adcValue=0;
volatile unsigned int ledValue=0;
ISR(ADC_vect)
{
    // TIFR1=(1<<OCF1A);

//if((ADCSRA & (1 << ADSC))!=0); /* wait until done */
adcValue = ADC; /* read ADC in */
/* Have 10 bits, want 3 (eight LEDs after all) */
ledValue = (adcValue >> 2);
/* Light up all LEDs up to ledValue */
//PORTD=0;
 // _delay_us(1000);
PORTD = ( ledValue);
 // _delay_ms(1000); 
  ledValue=(float)((ledValue/255.0)*100);
OCR2A=(unsigned int) ((ledValue/100.0)*0xff);
_delay_ms(2000);
//TCNT2=0;


}






void setup() {
  
   cli();
  ADMUX |= (1<<REFS0)|(1<< MUX1); /* reference voltage on AVCC */
   ADCSRA |= (1 << ADPS1) | (1 << ADPS0)|(1<<ADPS2); /* ADC clock prescaler /8 */
   ADCSRA |= (1 << ADEN)|(1<<ADIE)|(1<<ADATE); /* enable ADC */
  ADCSRB |=(1<<ADTS1) |(1<<ADTS2);
  ADCSRB &= ~(1<<ADTS0);

   TCCR1A = 0 ;     // initialize to zero both control registers
    TCCR1B = 0;     // In most cases, no need to write to TCCRC1
    TIMSK1 |= (1<< TOIE1 ) ;
         // disable global interrupts so that no interrupts occurs while configuring
    
    TCCR1A |=  (1<< WGM10)| ( 1 << COM1B1)  ;  // set wave-generation mode using TCCRA1 and TCCRB1. Check datasheet table to choose appropriate mode
 TCCR1A &= ~(1 << COM1B0) ;
  TCCR1B |= (1 << WGM13)|(1<<WGM12);     // note that you might need to set certain bits to 1 and others to zero in both registers
   
      TCNT1 = 0; 

  ICR1 = 63;
  

TCCR1B|=  (1 << CS12);



TCCR2A = 0 ;     // initialize to zero both control registers
    TCCR2B = 0;     // In most cases, no need to write to TCCRC1
    
         // disable global interrupts so that no interrupts occurs while configuring
          TCNT2= 0; 

    TCCR2A |=  (1<< WGM20) |( 1 << COM2A1)  ;  // set wave-generation mode using TCCRA1 and TCCRB1. Check datasheet table to choose appropriate mode
 
  TCCR2B |=(1<<CS21)  ;     // note that you might need to set certain bits to 1 and others to zero in both registers
   

 




   //int frequency=5000;
      // ICR1 can be used to store the top value is some modes
  
     // initialize counter by writing to TCNT1. Later when timer is turned on, counter will start from this value

  
    
    sei(); 
      ADCSRA |= (1 << ADSC);
  
DDRD = 0xFF;
DDRC &= ~(1 << DTOA);
DDRB |=(1<<MOTOR); 
}

void loop() {
  // put your main code here, to run repeatedly:
     
PORTB |= (1<< PB2);
        PORTB &= ~(1<<PB0);
  
  

}