Arduino Traffic Lights

Hi guys!Today what we are going to do is traffic lights!I thinks its a good example to understant delay command.Of course we will use an arduino board and here is a video of mine.

Here is the parts we need
-Arduino Board
-Breadboard
-3xLed(red/yellow/green)
-3x220 ohm Resistor
-Jumper Wires

Schematic of our circuit(really simple)

And the arduino code

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const int ledPins[] = {2, 3 ,4};

void setup() {

  pinMode(ledPins[0],OUTPUT);

  pinMode(ledPins[1],OUTPUT);

  pinMode(ledPins[2],OUTPUT);

}

void loop() {

  digitalWrite(ledPins[0],HIGH);

  delay(7000);

  digitalWrite(ledPins[0],LOW);

  digitalWrite(ledPins[1],HIGH);

  delay(2000);

  digitalWrite(ledPins[1],LOW);

  digitalWrite(ledPins[2],HIGH);

  delay(5000);

  digitalWrite(ledPins[2],LOW); 

}

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If you came here you did well ^-^. Ask me anything in the comment section. See you later in another tutorial. ^-^