The servo code didn't work

Other Hardware Motors, Mechanics, Power and CNC
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This one also didn't work:

#include "util/delay.h"
#include "avr/io.h"

#define OCR1_MIN 2000
#define OCR1_GAIN 2000

void setup() {
    // put your setup code here, to run once:

    // Setup Timer1
    //TCCR1A|=(1<<COM1A1)|(1<<COM1B1)|(1<<WGM11);        //NON Inverted PWM 
    //TCCR1B|=(1<<WGM13)|(1<<WGM12)|(1<<CS11)|(1<<CS10); //PRESCALER=64 MODE=14(FAST PWM)
    //TCCR1B|=(1<<WGM13)|(1<<WGM12)|(1<<CS11); //PRESCALER=8 MODE=14(FAST PWM)
    //ICR1=4999;  //fPWM=50Hz

    TCCR1A = 0b10100010;
    TCCR1B = 0b00011010; //PRESCALER=8 MODE=14(FAST PWM)
    //ICR1=4999;  //fPWM=50Hz
    ICR1 = 40000;
    
    ADCSRA = 0b11000111;

    // Setup ADC
     ADCSRA = (1<<ADSC) | (1<<ADEN) | (1<<ADPS2)| (1<<ADPS1) | (1<<ADPS0);//ADEN: ADC Enable
                                                              //Writing this bit to one enables the ADC.
                                                              //ADC Prescaler Selections
                                                              //111 for 128
    
    // Setup signal pins for 2 servos
     
     //DDRB |= (1 << PB2)|(1 << PB1);   //PWM Pins as Output
     DDRB = 0b00000110;
}

void loop() {
  write_arm_motors(read_knob_sensor(0),read_knob_sensor(1));
}

void write_arm_motors(float motor0, float motor1){
  OCR1A = OCR1_GAIN*motor0+OCR1_MIN;
  OCR1B = OCR1_GAIN*motor1+OCR1_MIN;
  return;
}

float read_knob_sensor(int knob){
  float reading = 0; /* Sensor reading, normalised
              (i.e., scaled) to be between 
              zero and one. */

              //ADCSRA = (1<<ADSC) | (1<<ADEN) | (1<<ADPS2)| (1<<ADPS1) | (1<<ADPS0);
  if(knob == 1){
  ADMUX |= 0b01100000; // ADC on Channel 0
  } else if(knob == 0){
  ADMUX |= 0b01100001; // ADC on Channel 1
  }

  //_delay_ms(15);
  
  int readingInter = 0;
  readingInter = ADCW>>6;
  reading = readingInter / 1023.0;
  _delay_ms(15);
  
  //printf("reading = %f\n", reading);
  
  return reading;
}