Traffic light / arduino

#include <RCSwitch.h>

RCSwitch mySwitch = RCSwitch();
int rood = 13;
int oranje = 12;
int groen = 11;
int AA = 1381717;
int AB = 1381716;
int BA = 1394005;
int BB = 1394004;
int CA = 1397077;
int CB = 1397076;
int DA = 1397845;
int DB = 1397844;

int mode = 0;
long timing = 0;
int teller;


void setup() {
  pinMode(rood, OUTPUT);
  pinMode(oranje, OUTPUT);
  pinMode(groen, OUTPUT);
  digitalWrite(oranje, HIGH);
  mySwitch.enableReceive(1);
}

void loop() {

  if(mode == 0){
      unsigned long currentMillis = millis();
      long interval = 1000;
      if(currentMillis - timing > interval) {
        timing = currentMillis;
        digitalWrite(oranje,  !digitalRead(oranje));
    }
  }

  if(mode == 1){
   //enkel rood
    digitalWrite(rood, HIGH);
    digitalWrite(oranje, LOW);
    digitalWrite(groen, LOW);
  }

  if(mode == 2){
   //enkel oranje
    digitalWrite(rood, LOW);
    digitalWrite(oranje, HIGH);
    digitalWrite(groen, LOW);
  }

  if(mode == 3){
   //enkel groen
    digitalWrite(rood, LOW);
    digitalWrite(oranje, LOW);
    digitalWrite(groen, HIGH);
  }

  if(mode == 4){
   //rood aan/uit
    digitalWrite(rood,  !digitalRead(rood));
    mode = -1;
    delay(500);
  }

  if(mode == 5){
   //oranje aan/uit
    digitalWrite(oranje,  !digitalRead(oranje));
    mode = -1;
    delay(500);
  }

  if(mode == 9){
   //groen aan/uit
    digitalWrite(groen,  !digitalRead(groen));
    mode = -1;
    delay(500);
  }

  if(mode == 7){
   unsigned long currentMillis = millis();
      long interval = analogRead(A0) + 25;
      if(currentMillis - timing > interval) {
        timing = currentMillis;
        if (teller == 0){
          digitalWrite(rood,  !digitalRead(rood));
        }
        if (teller == 1){
          digitalWrite(oranje,  !digitalRead(oranje));
          digitalWrite(rood,  !digitalRead(rood));
        }
        if (teller == 2){
          digitalWrite(oranje ,  !digitalRead(oranje));
          digitalWrite(groen,  !digitalRead(groen));
        }
        if (teller == 3){
          digitalWrite(groen,  !digitalRead(groen));
          teller = -1;
        }
        teller++;
    }
  }

  if(mode == 8){
    if(analogRead(A4) > 36){
     teller++;
    }
    if(teller == 15){
      digitalWrite(rood, HIGH);
      digitalWrite(oranje, HIGH);
      digitalWrite(groen, HIGH);
      delay(45);
      teller = 0;
    }
    else{
      digitalWrite(rood, LOW);
      digitalWrite(oranje, LOW);
      digitalWrite(groen, LOW);
    }
  }

  if(mode == 6){
    if(analogRead(A4) > 36){
     teller++;
    }
    if(teller == 15){
      digitalWrite(rood, HIGH);
      digitalWrite(oranje, HIGH);
      digitalWrite(groen, HIGH);
      delay(60);
      teller = -50;
    }
    else if (teller < -25){
      digitalWrite(rood, LOW);
      digitalWrite(oranje, HIGH);
      digitalWrite(groen, HIGH);
      delay(6);
      teller++;
    }
    else if (teller < 0){
      digitalWrite(rood, LOW);
      digitalWrite(oranje, LOW);
      digitalWrite(groen, HIGH);
      delay(6);
      teller++;
    }

    else{
      digitalWrite(rood, LOW);
      digitalWrite(oranje, LOW);
      digitalWrite(groen, LOW);
    }
  }


  if (mySwitch.available()) {

    int value = mySwitch.getReceivedValue();
    int newMode = 0;
    if (value == AA) {
      newMode = 1;
    }
    if (value == BA) {
      newMode = 2;
    }
    if (value == CA) {
      newMode = 3;
    }
    if (value == AB) {
      newMode = 4;
    }
    if (value == BB) {
      newMode = 5;
    }
    if (value == CB) {
      newMode = 6;
    }
    if (value == DA) {
      newMode = 7;
    }
    if (value == DB) {
      newMode = 8;
    }
    if(newMode != 0 && newMode != mode){
     mode = newMode;
     if (mode == 7){
       teller = 0;
       digitalWrite(rood, LOW);
       digitalWrite(oranje, LOW);
       digitalWrite(groen, LOW);
     }
    }

    mySwitch.resetAvailable();
  }
}