Schranke mit Ampel

#include <Servo.h>
Servo motor1;

void setup() {
  // put your setup code here, to run once:
  motor1.attach(8);  //Servo Schranke
  pinMode(4, OUTPUT);  // rot
  pinMode(2, OUTPUT);  // gruen
  pinMode(7, OUTPUT);  //gelb4
pinMode(A0,INPUT);  //receive signal from Sensor
pinMode(A1,OUTPUT); //GND PIN
pinMode(A2,OUTPUT); //VCC PIN
pinMode(2,OUTPUT); // LED PIN
digitalWrite(A2,HIGH); //Supply 5V to the + Terminal
digitalWrite(A1,LOW); // Connect GND to Arduino Uno
Serial.begin(9600);  //
}

int rot = 4;
int gruen = 2;
int gelb = 7;

void loop() {
  // put your main code here, to run repeatedly:
Serial.println(analogRead(A0)); //  print voltage of output
  if(analogRead(A0) < 500) {
motor1.write(90);  // Schranke auf
delay(500);
digitalWrite(gruen, HIGH);
digitalWrite(rot, LOW);
digitalWrite(gelb, HIGH);
delay(150);
digitalWrite(gelb, LOW);
delay(150);
digitalWrite(gelb, HIGH);
delay(150);
digitalWrite(gelb, LOW);
delay(150);
  }

  else {
  delay(5000);
digitalWrite(gruen, LOW);
digitalWrite(rot, HIGH);
delay(150);
digitalWrite(rot, LOW);
delay(150);
digitalWrite(rot, HIGH);
delay(150);
digitalWrite(rot, LOW);
delay(150);
digitalWrite(rot, HIGH);
delay(500)
motor1.write(4);  // Schranke zu
delay(5000);
}
}