Sonar Car Trouble

I been going over the code in my head and I thought that this should end up working.

//Arduino sonar car
#include <Ultrasonic.h>
#define TRIGGER_PIN  12
#define ECHO_PIN     13
Ultrasonic ultrasonic(TRIGGER_PIN, ECHO_PIN);
#include <Servo.h>
Servo myservo1;        
Servo myservo2;
Servo myservo3;
int pos = 0;
float cmMsec;

void setup()
{
  
  myservo1.attach(10,400,2400); 
  myservo2.attach(9,400,2400); 
  myservo3.attach(11);  
}  

void loop()
{
  do
  {
  float cmMsec;
  long microsec = ultrasonic.timing();
  cmMsec = ultrasonic.convert(microsec, Ultrasonic::CM);
  Serial.print(", CM: ");
  Serial.print(cmMsec);  
  delay(200);
  }
  while(cmMsec<15);
  {
    myservo1.writeMicroseconds(1400); //FORWARD
       myservo2.writeMicroseconds(1600);
                delay(1000);
    for(pos = 0; pos < 180; pos += 1)  // goes from 0 degrees to 180 degrees 
    {                                  // in steps of 1 degree 
      myservo3.write(pos);              // tell servo to go to position in variable 'pos' 
      delay(100);                       // waits 15ms for the servo to reach the position 
    }
    for(pos = 180; pos>=1; pos-=1)     // goes from 180 degrees to 0 degrees 
    {                                
      myservo3.write(pos);              // tell servo to go to position in variable 'pos' 
      delay(100);                       // waits 15ms for the servo to reach the position 
    }
   if(cmMsec>=15);
    {
             myservo1.writeMicroseconds(1600); //BACKWARD
             myservo2.writeMicroseconds(1400);
                      delay(2000);       
             myservo1.writeMicroseconds(1400); //LEFT     
             myservo2.writeMicroseconds(1400);
                      delay(2000);
     }}}

My servos aren't rotating at all now. I have no idea why. This code seems like it should work.