This Arduino code simulates the operation of a traffic light....

This Arduino code simulates the operation of a traffic light. Here's a breakdown of its behavior:

Code Function

1. Initialization in setup:

   • Three pins of the Arduino board (2, 4, and 8) are configured as outputs.
   • These pins are associated with red, yellow, and green variables, respectively.

2. Main Loop (loop):

   • The code repeatedly cycles through actions that simulate a traffic light system.

Step-by-Step Behavior

1. Red Light Turns On:

   • digitalWrite(red, HIGH); turns the red light on (by setting pin 2 to HIGH).
   • The program waits for 3 seconds (delay(3000);).

2. Yellow Light Turns On (Alongside Red):

   • digitalWrite(yellow, HIGH); turns on the yellow light (by setting pin 4 to HIGH).
   • The program waits for 1 second (delay(1000);).

3. Switch to Green Light:

   • digitalWrite(red, LOW); and digitalWrite(yellow, LOW); turn off both the red and yellow lights.
   • digitalWrite(green, HIGH); turns on the green light (by setting pin 8 to HIGH).
   • The program waits for 3 seconds (delay(3000);).

4. Transition Back to Yellow Light:

   • digitalWrite(green, LOW); turns off the green light.
   • digitalWrite(yellow, HIGH); turns on the yellow light again (to indicate caution).
   • The program waits for 1 second (delay(1000);).

5. Restart the Cycle:

   • digitalWrite(yellow, LOW); turns off the yellow light.
   • The loop restarts from step 1.

Summary:

This code creates a basic traffic light simulation where:

• The red light stays on for 3 seconds.
• The yellow light lights up for 1 second (while transitioning between red and green).
• The green light stays on for 3 seconds.
• The yellow light appears again for 1 second before transitioning back to red.
• This cycle continues indefinitely.