Architectural Model of a Bus Stop with Automatic Sunshade

#include <Servo.h>

int easternLight = 0;
int westernLight = 0;
int rainSensed = 0;
int sunshadePosition = 0;
int rainRhreshold = 512;
int sunshadeExpanded = 120;
int sunshadeContracted = 60;
int ambientLighting = 0;
int turnOnLightsOn = 150;
int ledIntensity = 0;
int ledPower = 0;
Servo servo;

void setup()
{
  pinMode(A4, OUTPUT); // Interior lighting of the bus stop
  pinMode(A5, OUTPUT); // Street light
  pinMode(A1, INPUT); // Western light
  pinMode(A2, INPUT); // Eastern light
  pinMode(A3, INPUT); // Rain sensor analog
  pinMode(2, INPUT); // Rain sensor digital
  servo.attach(A0); // Servo
  servo.write(sunshadeContracted);
}

void loop()
{
  // Get sensor values
  easternLight = analogRead(A2);
  westernLight = analogRead(A1);
  rainSensed = analogRead(A3);
  sunshadePosition = servo.read();
  ambientLighting = ((easternLight + westernLight) / 2); // Average the brightness of the east and west
  // Find out if it is raining?
  if (rainSensed < rainRhreshold) {
    // It is raining
    if (sunshadePosition != sunshadeExpanded) {
      servo.write(sunshadeExpanded);
    }
  } else {
    // It is not raining
    if (ambientLighting <= turnOnLightsOn) {
      // It's getting dark, turn on the lights
      ledPower = ((turnOnLightsOn - ambientLighting) * 4);
      analogWrite(A5, ledPower);
      analogWrite(A4, ledPower);
    } else {
      // There is a lot of sun light
      analogWrite(A5, 0);
      analogWrite(A4, 0);
      if (easternLight <= westernLight) {
        // It's sunset
        if (sunshadePosition != sunshadeExpanded) {
          servo.write(sunshadeExpanded);
        }
      }
      if (easternLight > westernLight) {
        // It's down
        if (sunshadePosition != sunshadeContracted) {
          servo.write(sunshadeContracted);
        }
      }
    }
  }
  delay(100);
}