trafficlight.ino

int switchState_1 = 0;
int switchState_2 = 0;
void setup() 
{
 pinMode(2,OUTPUT); //RED 1
 pinMode(3,OUTPUT); //YELLOW 1
 pinMode(4,OUTPUT); //GREEN 1
 pinMode(5,OUTPUT); //RED 2
 pinMode(6,OUTPUT); //YELLOW 2
 pinMode(7,OUTPUT); //GREEN 2
 pinMode(11,INPUT); //SWITCH 1 
 pinMode(12,INPUT); //SWITCH 2
 
  
}

void loop() 

{
    switchState_1 = digitalRead(11);
    switchState_2 = digitalRead(12);

digitalWrite(2,HIGH); //R 1
          digitalWrite(7,HIGH); //G 2
          delay(6000);
          digitalWrite(7,LOW); //G 2
          digitalWrite(6,HIGH); //Y 2
          delay(3000);
          digitalWrite(6,LOW); //Y 2
          digitalWrite(5,HIGH); // R 2
          digitalWrite(2,LOW); //R 1
          digitalWrite(4,HIGH); //G 1
          delay(6000);
          digitalWrite(4,LOW); //G 1
          digitalWrite(3,HIGH); //Y 1
          delay(3000);
          digitalWrite(3,LOW); //Y 1
          digitalWrite(5,LOW); //R 2

    if((switchState_1 == 1 && switchState_2 == 0))
    {
      if(digitalRead(2)== 1)
      {
        if(digitalRead(7)==1)
        {
          delay(2000);
          digitalWrite(7,LOW); //G 2
          digitalWrite(6,HIGH); //Y 2
          delay(1500);

          digitalWrite(5,HIGH); // R 2
          digitalWrite(2,LOW); //R 1
          digitalWrite(4,HIGH); //G 1
          delay(6000);
          digitalWrite(4,LOW); //G 1
          digitalWrite(3,HIGH); //Y 1
          delay(3000);
          digitalWrite(3,LOW); //Y 1
          digitalWrite(5,LOW); //R 2
        }
        
      }
    }

    else if((switchState_1 == 0 && switchState_2 == 1))
    {
      if(digitalRead(5)== 1)
      {
        if(digitalRead(4)==1)
        {
          delay(2000);
          digitalWrite(4,LOW); //G 1
          digitalWrite(3,HIGH); //Y 1
          delay(1500);

          digitalWrite(2,HIGH); // R 1
          digitalWrite(5,LOW); //R 2
          digitalWrite(7,HIGH); //G 2
          delay(6000);
          digitalWrite(7,LOW); //G 2
          digitalWrite(6,HIGH); //Y 2
          delay(3000);
          digitalWrite(6,LOW); //Y 2
          digitalWrite(2,LOW); //R 1
        }
        
      }
    }
  }