Components Needed:

Arduino board (Arduino Uno)
3 LEDs (Red, Yellow, Green)
3 220-ohm resistors
Breadboard and jumper wires

Circuit Diagram:

Connect the red LED's anode to pin 13 and cathode to ground (through a resistor).
Connect the yellow LED's anode to pin 12 and cathode to ground (through a resistor).
Connect the green LED's anode to pin 11 and cathode to ground (through a resistor).

Arduino Code:

// Define LED pins const int redLED = 13; const int yellowLED = 12; const int greenLED = 11; void setup() { // Set LED pins as OUTPUT pinMode(redLED, OUTPUT); pinMode(yellowLED, OUTPUT); pinMode(greenLED, OUTPUT); } void loop() { // Red light on digitalWrite(redLED, HIGH); delay(5000); // Keep red on for 5 seconds // Red light off, Yellow light on digitalWrite(redLED, LOW); digitalWrite(yellowLED, HIGH); delay(2000); // Keep yellow on for 2 seconds // Yellow light off, Green light on digitalWrite(yellowLED, LOW); digitalWrite(greenLED, HIGH); delay(5000); // Keep green on for 5 seconds // Green light off digitalWrite(greenLED, LOW); }

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