Do you think my program will work?

Oh I get it! I'll remove them.

So right know, this is my code. Since my motor was already on a PWM pin, I only changed every digitalWrite by a analogWrite

const int pingPin = 7;
int moteur= 3;
#include <Servo.h> 
int rouge = 6;
int vert = 5;
int bleu= 4;
Servo myservo;
int pos = 0;
const int maxsonar = 1; 
long anVolt, inches, cm2;
int sum=0;
int avgrange=60;
long duration,cm;




void setup() {
  

pinMode(moteur, OUTPUT);
pinMode(rouge, OUTPUT);
pinMode(vert,OUTPUT);
pinMode(bleu,OUTPUT);
myservo.attach(9);
pinMode(maxsonar,INPUT);

}




void loop()
{
  
  pinMode(pingPin, OUTPUT);
  digitalWrite(pingPin, LOW);
  delayMicroseconds(2);
  digitalWrite(pingPin, HIGH);
  delayMicroseconds(5);
  digitalWrite(pingPin, LOW);
  pinMode(pingPin, INPUT);
  duration = pulseIn(pingPin, HIGH);

 

  cm = microsecondsToCentimeters(duration);
  


  
  delay(100);
}

long microsecondsToInches(long microseconds)
{
  
  return microseconds / 74 / 2;
}

long microsecondsToCentimeters(long microseconds)
{
  return microseconds / 29 / 2;



  for(int i = 0; i < avgrange ; i++)
  {

    anVolt = analogRead(maxsonar)/2;
    sum += anVolt;
    delay(10);

  }  

  inches = sum/avgrange;
  cm2 = inches * 2.54;


  sum = 0;

  delay(500);
if (cm2>30 and cm>30 ) 
{
digitalWrite(rouge,HIGH);
delay(500);
digitalWrite(rouge,LOW);
delay(500);  
digitalWrite(vert,HIGH);
delay(500);
digitalWrite(vert,LOW);
delay(500); 
digitalWrite(bleu,HIGH);
delay(500);
digitalWrite(bleu,LOW);
delay(500);
  
analogWrite(moteur,170);
delay(500);


}

if (cm < 30 and cm2 <30 )
{
    analogWrite(moteur,0);
  delay(500);
  digitalWrite(rouge,HIGH);
  delay(500); 
 }
   
  if(cm2>30 and cm<30)
  
    { 
     analogWrite(moteur, 90);
  delay(500);
  
        for(pos = 0; pos < 180; pos += 1)  
  {                                   
    myservo.write(pos);            

    
   } 
 digitalWrite(vert,HIGH);
 delay(500);
 digitalWrite(vert,LOW);
delay(500); }
  
  if(cm2<30 and cm>30)
{  
  analogWrite(moteur, 90);
  delay(500);
  
   for(pos = 180; pos>=1; pos-=1)      
  {                                
   myservo.write(pos);               
                      
  } 
  digitalWrite(bleu,HIGH);
  delay(500);
  digitalWrite(bleu,LOW);
  delay(500); 
   } 

}