I have modified my servo so that it can turn left and right continuously. But now I want it to halt inbetween. I use the mbed Servo function. What do I need to put in my program to get a '0', so no pulses, at pin p21?

Below my code. Where it states 'myServo=0.5;' it should turn of the PWM on p21 to enable the motor to stop rotating. I tried various possibilities for myServo here, but the motor doesn't stop because I removed the stop and the feedback to enable full swing rotation.

#include "mbed.h"
#include "Servo.h"

Servo myServo (p21);

/* myServo defines the setting of the Servo
myServo>0.55 the motor turns left fast
myServo<0.50 the motor turns right fast

at myServo=0.52 the motor turns left slow...
at myServo=0.515 the motor turns right slow...
*/

/* start with a turn with a fixed wait time of 3s
then continue endlessly with a random wait time between turns*/

int main() {
  int i,j,k;
 
  j=1;
  k=1;
 
    for (i=0 ; i<100 ; i++){
      myServo = i/100.0;
      wait (0.01);
    }
 
   myServo=0.5; /*here it should wait, not turn. How to shut of the pwm?*/

   wait (3);    /*wait 3s*/
   
    for (i=100 ; i>0 ; i--){
      myServo = i/100.0;
      wait (0.01);
    }
   
    myServo=0.5; /*here it should wait, not turn. How to shut of the pwm?*/

    wait (3);   /*wait 3s*/
 
  while (1) {
    for (i=0 ; i<100 ; i++){
      myServo = i/100.0;
      wait (0.01);
    }
   
    myServo=0.5;    /*here it should wait, not turn. How to shut of the pwm?*/
   
    j=(rand()%10)+1;  /*rand()%10 means any number between 0 and 10!*/
   
   wait (j);        /*random wait between 0 and 10s*/
   
    for (i=100 ; i>0 ; i--){
      myServo = i/100.0;
      wait (0.01);
    }

    myServo=0.5;    /*here it should wait, not turn. How to shut of the pwm?*/

    k=(rand()%10)+1;
   
    wait (k);        /*random wait between 0 and 10s*/
  }
}