int a=0;
  int b =0;
  
void setup()
{
  pinMode(47,INPUT);
  pinMode(49,INPUT);
  pinMode(44,OUTPUT);
  pinMode(45,OUTPUT);
  pinMode(46,OUTPUT);
  //TCCR5A = 0; // Clear the TCCR5A register
  //TCCR5B = 0; // Clear the TCCR5B register

  // Set the Timer mode to Normal mode
 // TCCR5B &= ~(1<<WGM52);
 // TCCR5A &= ~(1<<WGM50);
  //TCCR5A &= ~(1<<WGM51);

  // Set the Clock Select bits to use the external clock source on T5 pin (pin 47)
  //TCCR5B |= (1<<CS50);
  //TCCR5B &= ~(1<<CS51);
  //TCCR5B |= (1<<CS52);

  // Reset the Timer 5 counter
  //TCNT5 = 0;

 /*TCCR5A = 0;           // Init Timer1
  TCCR5B = 0;  
  TCCR5A = B01010100;   //a 1 is need in the A reg to turn each pin
  TCCR5B |= B00000011;  // Prescalar = 64
  TCNT5 = 63035;        // Timer Preloading
  TIMSK5 |= B00000001;
  //OCR5A = 5000; // Timer CompareA Register
  //OCR5B = 5000;
 // OCR5C = 5000;
  //TIMSK5 |= B001110;  // Enable Timer COMPA Interrupt
*/
// Set up Timer 5
  TCCR5A = 0; // Clear the TCCR5A register
  TCCR5B = 0; // Clear the TCCR5B register

  // Set the Timer mode to Normal mode
  TCCR5B &= ~(1<<WGM52);
  TCCR5A &= ~(1<<WGM50);
  TCCR5A &= ~(1<<WGM51);

  // Set the Clock Select bits to use the external clock source on T5 pin (pin 47)
  TCCR5B |= (1<<CS50);
  TCCR5B &= ~(1<<CS51);
  TCCR5B |= (1<<CS52);

  // Reset the Timer 5 counter
  TCNT5 = 0;

  Serial.begin(9600);
  Serial.println(TCCR5A,BIN);
  Serial.println(TCCR5B,BIN);
  Serial.println(TIMSK5,BIN);
}
 
void loop()
{
  a=digitalRead(47);

  //Serial.print("Counter Ticks COMPAIR = ");
  //Serial.println(TCNT5);
   Serial.print("Counter Ticks OVERFLOW = ");
  Serial.println(a);
 // Serial.print("Counter Ticks = ");
  //Serial.println(TCNT5);
  delay(250);

  
  }
ISR(TIMER5_COMPA_vect)
{
   //Serial.print("Counter Ticks COMPAIR = ");
 //Serial.println(TCNT5);

  OCR5A =OCR5A+5000 ; // Advance The COMPA Register
  // Handle The 100ms Timer Interrupt
  
}
ISR(TIMER5_COMPB_vect)
{
   //Serial.print("Counter Ticks COMPAIR = ");
  //Serial.println(TCNT5);

  OCR5B += 5000; // Advance The COMPA Register
  // Handle The 100ms Timer Interrupt
  
}
ISR(TIMER5_COMPC_vect)
{
   //Serial.print("Counter Ticks COMPAIR = ");
  //Serial.println(TCNT5);

  OCR5C += 5000; // Advance The COMPA Register
  // Handle The 100ms Timer Interrupt
  
}
ISR(TIMER5_OVF_vect)
{
  
  TCNT5 = 63035; // Timer Preloading
  // Handle The 100ms Timer Interrupt
  //...
  
}