#include <Servo.h>
#include <NewPing.h>// including Library for ultrasonic sensor
int triggerPin = 4; 
#define echoPin 3
#define maxDistance 400
NewPing varName(triggerPin, echoPin, maxDistance);
Servo myservo;

void setup() {
  myservo.attach(3);
  Serial.begin(9600);
    // put your setup code here, to run once:

}

void loop() {
  for(int pos = 0;pos<=180;pos++){
    myservo.write(pos);//turn 1 degree
   delay(10);//afterevery ==.01 sec 
  }
 
for(int pos = 180; pos>=90; pos--){
    myservo.write(pos);
    delay(100);//
  }
for(int pos = 90; pos>=0; pos--){
    myservo.write(pos);
    delay(10);
  }
}