#include <Servo.h>

Servo myServo;

unsigned long movingTime=3000;
unsigned long moveStartTime;
int startAngle=0;
int stopAngle=90;
bool servoStav=0;

void setup() {
  myServo.attach(11);
  myServo.write(0);
  delay(200);
  moveStartTime=millis();
  Serial.begin(9600);
}

void loop() {
  unsigned long progress = millis()-moveStartTime;
  if(progress<=movingTime){
    long angle = map(progress,0,movingTime,startAngle,stopAngle+1);
    Serial.println(angle);
    myServo.write(angle);
  }
  if(progress>movingTime){
    servoStav=!servoStav;
    if(servoStav==1){
      startAngle=90;
      stopAngle=0;
    }
    if(servoStav==0){
      startAngle=0;
      stopAngle=90;
    }

   moveStartTime=millis();
  }

}