ATmega328 Timer 0 ms delay and Timer 1 us delay

/// Timer 1 Code for us delay ///

void initTimer1() {

  //set timer 1 into CTC mode by placing 1 into WGM12.  all others are zero
  TCCR1A &= ~(1 << WGM10);
  TCCR1A &= ~(1 << WGM11);
  TCCR1B |= (1 << WGM12);
  TCCR1B &= ~(1 << WGM13);
  // calculate OCR1A for a 1us delay.  OCR1A = (Td * fclk)/ Ps
  // prescaler of 8
  // OCR1A = (1e-6 * 16e6)/8
  // OCR1A = 2
  //start the clock with prescaler 8 and OCR1A = 2
  TCCR1B &= ~((1 << CS12) | (1 << CS10));
  TCCR1B |=  (1 << CS11);
  OCR1A = 2;
}
void delayUs(unsigned int delay) {

  unsigned int count = 0;

  // set the counter flag down
  TIFR1 |= (1 << OCF1A);

  // clear the count register
  TCNT1 = 0;

  // enter a loop to compare count with delay value needed
  while (count < delay) {

    if (TIFR1 & (1 << OCF1A)) { //increment every time the timer raises a flag (counting 1 us flags)

      count++;

      TIFR1 |= (1 << OCF1A);  //set timer to start counting again
    }
  }

}

/// Timer 0 Code for ms delay///

void initTimer0() {
  // set the timer mode to be "CTC"
  TCCR0A &= ~(1 << WGM00);
  TCCR0A |=  (1 << WGM01);
  TCCR0B &= ~(1 << WGM02);
  OCR0A = 249;
 
}

/* This delays the program an amount specified by unsigned int delay.
  Use timer 0. Keep in mind that you need to choose your prescalar wisely
  such that your timer is precise to 1 millisecond and can be used for
  100-200 milliseconds
*/
void delayMs(unsigned int delay) {
  for (int x = 0 ; x <= delay ; x++) {
    OCR0A = 249;
    TCCR0A = 0x28;
    TCCR0B |= 0x04;
  }
}

#include <avr/io.h>  // (atmel studio 6 include)

void delay();
void delayMs(unsigned int delay);
void delayUs(unsigned int delay);
void initTimer1();
void initTimer0();

int main()
{
    DDRB = 0xFF;
    initTimer1();
    initTimer0();
 
    while(1)
      {
      PORTB = 0xff;
      delayMs(5);
   
      PORTB = 0x00;
      delayMs(5);

   /* PORTB = 0xff;
      delayUs(5);
 
      PORTB = 0x00;
      delayUs(5);  */
      }
    return(1);
}



/// Timer 1 Code for us delay ///

void initTimer1() {

  //set timer 1 into CTC mode by placing 1 into WGM12.  all others are zero
  TCCR1A &= ~(1 << WGM10);
  TCCR1A &= ~(1 << WGM11);
  TCCR1B |= (1 << WGM12);
  TCCR1B &= ~(1 << WGM13);
  // calculate OCR1A for a 1us delay.  OCR1A = (Td * fclk)/ Ps
  // prescaler of 1
  // OCR1A = (1e-6 * 16e6)/8    
  // OCR1A = 2
  //start the clock with prescaler 1 and OCR1A = 14
  TCCR1B &= ~(1 << CS12);
  TCCR1B |=  (1 << CS10);
  TCCR1B &= ~(1 << CS11);
  OCR1A = 14;
}


void delayUs(unsigned int delay)
{
unsigned int count = 0;

  TIFR1 |= (1 << OCF1A);  // set the counter flag down

  TCNT1 = 0;  // clear the count register

  // enter a loop to compare count with delay value needed
  while (count < delay)
    {
    if (TIFR1 & (1 << OCF1A))
      { //increment every time the timer raises a flag (counting 1 us flags)
      count++;
      TIFR1 |= (1 << OCF1A);  //set timer to start counting again
      }
  }
}


/// Timer 0 Code for ms delay//

void initTimer0() {

    //set timer 0 into CTC mode by placing 1 into WGM01.  all others are zero
    TCCR0A &= ~(1 << WGM00);  // 0
    TCCR0A |= (1 << WGM01);   // 1
    TCCR0B &= ~(1 << WGM02);  // 0
 
     //start the clock with prescaler 64 and OCR0A = 249

    TCCR0B |= (1 << CS00);
    TCCR0B |= (1 << CS01);
    TCCR0B &= ~(1 << CS02);
    OCR0A = 249;
}

/* This delays the program an amount specified by unsigned int delay.
  Use timer 0. Keep in mind that you need to choose your prescalar wisely
  such that your timer is precise to 1 millisecond and can be used for
  100-200 milliseconds
*/


void delayMs(unsigned int delay)
{
    unsigned int count = 0;
 
    TIFR0 |= (1 << OCF0A);  // set the counter flag down

    TCNT0 = 0;  // clear the count register

    // enter a loop to compare count with delay value needed
    while (count < delay)
      {
      if (TIFR0 & (1 << OCF0A))
        { //increment every time the timer raises a flag (counting 1 us flags)
        count++;
        TIFR0 |= (1 << OCF0A);  //set timer to start counting again
        }
      }
}