Activating Servos Simultaneously

Hello...I need help...and I don't think it is a difficult issue, but I just can't seem to get it yet.

I am trying to push a button that makes a servo move 90 degrees for 10 seconds, then turn back. I have this working fine. The problem happens when I try to do this for more than one servo.

I can make it work for two servos, but not while the first one is still counting off its 10 second period.

Here is my code...CAN SOMEONE GUIDE ME TO A SOLUTION?

/*

  SweepTwoServos

  By Philip van Allen <philvanallen.com> for the VarSpeedServo.h library (October 2013)

  This example code is in the public domain

*/

#include <VarSpeedServo.h>

VarSpeedServo myservo_1;            // create servo object to control a servo

VarSpeedServo myservo_2;            //a maximum of eight servo objects can be created

const int servoPin1 = 9;                     // the digital pin used for the first servo

const int servoPin2 = 10;                     // the digital pin used for the second servo

unsigned long startTime_1 = 0;     // will store last time servo was opened

unsigned long startTime_2 = 0;     // will store last time servo was opened

int valveOpenPeriod_1 = 10000;    // sets the period the servo should be opened - 10 seconds

int valveOpenPeriod_2 = 5000;     // sets the period the servo should be opened - 5 seconds

void setup() {

  myservo_1.attach(servoPin1);  // attaches the servo on pin 9 to the servo object

  myservo_1.write(90,30,false);  // set the intial position of the servo, move slowly, run in background

  myservo_2.attach(servoPin2);  // attaches the servo on pin 10 to the servo object

  myservo_2.write(90,30,false);  // set the intial position of the servo, move slowly, run in background

}

void loop()

{

  unsigned long currentMillis = millis(); // start counting

  if(digitalRead(3) == HIGH)              // if inflation button is pushed

  {   

    startTime_1 = currentMillis;          // reset start time to current time

    while(millis() - startTime_1 < valveOpenPeriod_1)

    {

      myservo_1.write(180,30,false);   // tell servo to go to position 180 to open valve

      delay(10);                                    // waits 10ms for the servo to reach the position

    }

     myservo_1.write(90,30,false);     // tell servo to go to back to original position 90 to close valve

     delay(10);                                    // waits 10ms for the servo to reach the position

  }

/* THE PROBLEM

The two blocks of code, one above and one below, work independently but not simultaneously.

How do I get them to work simultaneously. In other words, I need each servo to move 90 degrees

for a period of time, then move back to its original position. I need this to work for

each servo whenever I press the putton.

*/

  if(digitalRead(5) == HIGH)              // if inflation button is pushed

  {   

    startTime_2 = currentMillis;           // reset start time to current time

    while(millis() - startTime_2 < valveOpenPeriod_2)

    {

      myservo_2.write(180,127,true);   // tell servo to go to position 180 to open valve

      delay(10);                               // waits 10ms for the servo to reach the position

    }

     myservo_2.write(90,127,true);    // tell servo to go to position 90 to close valve

     delay(10);                               // waits 10ms for the servo to reach the position

  }

}