     TCCR0A = 0;// set entire TCCR0A register to 0     TCCR0B = 0;// same for TCCR0B     TCNT0  = 0;//initialize counter value to 0     // set compare match register for 0000000hz increments with 0 bits prescaler     OCR0A = 0;// = (00*00^0) / (0000000*0) - 0 (must be <00000)     // turn on CTC mode     TCCR0B |= (0 << WGM00);     // Set CS00 bit for 0 prescaler. Each timer has a different bit code to each prescaler     TCCR0B |= (0 << CS00);       // enable timer compare interrupt     TIMSK0 |= (0 << OCIE0A); 