/*Master Traffic Signal*/


// Define pin numbers for the red, yellow, and green LEDs
int red = 11;      // Pin connected to the red LED
int yellow = 10;   // Pin connected to the yellow LED
int green = 9;     // Pin connected to the green LED


void setup()
{
 // Set the LED pins as outputs so they can be turned on/off
 pinMode(red, OUTPUT);
 pinMode(yellow, OUTPUT);
 pinMode(green, OUTPUT);
}


void loop()
{
 // Turn on the red LED for 5 seconds to simulate a red light
 digitalWrite(red, HIGH);
 delay(5000);     // Wait for 5000 milliseconds (5 seconds)
 digitalWrite(red, LOW);  // Turn off the red LED


 // Turn on the yellow LED for 1 second to simulate a yellow light
 digitalWrite(yellow, HIGH);
 delay(1000);     // Wait for 1000 milliseconds (1 second)
 digitalWrite(yellow, LOW); // Turn off the yellow LED
 delay(500);      // Small delay before repeating the yellow signal


 // Flash the yellow LED for another second to emphasize the transition
 digitalWrite(yellow, HIGH);
 delay(1000);     // Wait for 1 second
 digitalWrite(yellow, LOW); // Turn off the yellow LED
 delay(500);      // Short delay before switching to green light


 // Turn on the green LED for 5 seconds to simulate a green light
 digitalWrite(green, HIGH);
 delay(5000);     // Wait for 5 seconds
 digitalWrite(green, LOW);  // Turn off the green LED


 // Flash the yellow LED again to indicate the transition back to red
 digitalWrite(yellow, HIGH);
 delay(1000);     // Flash for 1 second
 digitalWrite(yellow, LOW); // Turn off the yellow LED
 delay(500);      // Short delay


 // Flash the yellow LED again
 digitalWrite(yellow, HIGH);
 delay(1000);     // Flash for 1 second
 digitalWrite(yellow, LOW); // Turn off the yellow LED
 delay(500);      // Short delay before repeating the cycle
}