// https://www.youtube.com/channel/UCaXI2PcsTlH5g0et67kdD6g  //
// Traffic Lights //
// By MOHD SOHAIL //

int led1=2;      // Conncet a resistor of 220 ohms with GND terminal 
int led2=3;
int led3=4;
int led4=5;
int led5=6;
int led6=7;
int led7=8;
int green=11;     // connect 220 ohm resistor with LEDs 
int yellow=12;
int red=13;
int kondisi;

void setup() {
 pinMode(led1, OUTPUT);
 pinMode(led2, OUTPUT);
 pinMode(led3, OUTPUT);
 pinMode(led4, OUTPUT);
 pinMode(led5, OUTPUT);
 pinMode(led6, OUTPUT);
 pinMode(led7, OUTPUT);
 pinMode(green, OUTPUT);
 pinMode(yellow, OUTPUT);
 pinMode(red, OUTPUT);
 Serial.begin(9600);
 

}

void loop() {
  switch(kondisi){
    case 0:
     digitalWrite(led1,1);
    digitalWrite(led2,1);
    digitalWrite(led3,1);
    digitalWrite(led4,1);
    digitalWrite(led5,1);
    digitalWrite(led6,1);
    digitalWrite(led7,0);
    break;
    case 1:
    digitalWrite(led1,0);
    digitalWrite(led2,1);
    digitalWrite(led3,1);
    digitalWrite(led4,0);
    digitalWrite(led5,0);
    digitalWrite(led6,0);
    digitalWrite(led7,0);
    break;
    case 2:
     digitalWrite(led1,1);
    digitalWrite(led2,1);
    digitalWrite(led3,0);
    digitalWrite(led4,1);
    digitalWrite(led5,1);
    digitalWrite(led6,0);
    digitalWrite(led7,1);
    break;
    case 3:
    digitalWrite(led1,1);
    digitalWrite(led2,1);
    digitalWrite(led3,1);
    digitalWrite(led4,1);
    digitalWrite(led5,0);
    digitalWrite(led6,0);
    digitalWrite(led7,1);
    break;
    case 4:
    digitalWrite(led1,0);
    digitalWrite(led2,1);
    digitalWrite(led3,1);
    digitalWrite(led4,0);
    digitalWrite(led5,0);
    digitalWrite(led6,1);
    digitalWrite(led7,1);
    break;
    case 5:
      digitalWrite(led1,1);
    digitalWrite(led2,0);
    digitalWrite(led3,1);
    digitalWrite(led4,1);
    digitalWrite(led5,0);
    digitalWrite(led6,1);
    digitalWrite(led7,1);
    break;
    case 6:
    digitalWrite(led1,1);
    digitalWrite(led2,0);
    digitalWrite(led3,1);
    digitalWrite(led4,1);
    digitalWrite(led5,1);
    digitalWrite(led6,1);
    digitalWrite(led7,1);
    break;
    case 7: 
    digitalWrite(led1,1);
    digitalWrite(led2,1);
    digitalWrite(led3,1);
    digitalWrite(led4,0);
    digitalWrite(led5,0);
    digitalWrite(led6,0);
    digitalWrite(led7,0);
    break;
    case 8:
    digitalWrite(led1,1);
    digitalWrite(led2,1);
    digitalWrite(led3,1);
    digitalWrite(led4,1);
    digitalWrite(led5,1);
    digitalWrite(led6,1);
    digitalWrite(led7,1);
    break;
    case 9:
    digitalWrite(led1,1);
    digitalWrite(led2,1);
    digitalWrite(led3,1);
    digitalWrite(led4,1);
    digitalWrite(led5,0);
    digitalWrite(led6,1);
    digitalWrite(led7,1);
    break;
  }

  for(int r=9; r>0; r--){
    kondisi = r;
    Serial.println(r);
    delay(1000);
  }
  
 digitalWrite(green,0);
 digitalWrite(yellow,0);
 digitalWrite(red,1);
 delay(1000);

 
}