// === Victor Ugwu ====

// Module #5 project

const int red_LED1 = 14;  // The red LED1 is wired to ESP32 board pin GPIO14
const int yellow_LED1 =12;  // The yellow LED1 is wired to ESP32 board pin GPIO12
 
const int green_LED1 = 13; // The green LED1 is wired to ESP32 board pin GPIO13
const int red_LED2 = 25;  // The red LED2 is wired to Mega board pin GPIO25
const int yellow_LED2 = 26; // The yellow LED2 is wired to Mega board pin GPIO 26
const int green_LED2 = 27; // The green LED2 is wired to Mega board pin GPIO 27

int Xw_value;

const int Xw_button = 19; //Cross Walk button

// the setup function runs once when you press reset or power the board 
void setup() {

pinMode(Xw_button, INPUT_PULLUP); // 0=pressed, 1 = unpressed button 
Serial.begin(115200);
pinMode(red_LED1, OUTPUT); // initialize digital pin 14 (Red LED1) as an output.
pinMode(yellow_LED1, OUTPUT); // initialize digital pin 12 (yellow LED1) as an output.
pinMode(green_LED1, OUTPUT);  // initialize digital pin 13 (green LED1) as an output.
 
pinMode(red_LED2, OUTPUT); // initialize digital pin 25(Red LED2) as an output.
pinMode(yellow_LED2, OUTPUT); // initialize digital pin 26 (yellow LED2) as an output.
pinMode(green_LED2, OUTPUT); // initialize digital pin 27 (green LED2) as an output.
}

// the loop function runs over and over again forever 
void loop() {

// read the cross walk button value: 
Xw_value=digitalRead(Xw_button);

if (Xw_value == LOW ){ // if crosswalk button (X-button) pressed

digitalWrite(yellow_LED1 , LOW);  // This should turn off the YELLOW LED1
digitalWrite(green_LED1, LOW);  // This should turn off the GREEN LED1
digitalWrite(yellow_LED2 , LOW); // This should turn off the YELLOW LED2
digitalWrite(green_LED2, LOW);  // This should turn off the GREEN LED2
 
for (int i=10; i>0; i--)

{ 

Serial.print(" Count = "); Serial.print(i);
Serial.println(" == Walk == ");

digitalWrite(red_LED1, HIGH);  // This should turn on the RED LED1 
digitalWrite(red_LED2, HIGH);  // This should turn on the RED LED2 
delay(500);  //wait 0.5 seconds
digitalWrite(red_LED1, LOW);  // This should turn off the RED LED1 
digitalWrite(red_LED2, LOW);  // This should turn off the RED LED2 
delay(500);  //wait 0.5 seconds
} // End of counter

} //

else // No Emergency ===

{

Serial.println(" == Do Not Walk == ");

// The next three lines of code turn on the red LED1 
digitalWrite(red_LED1, HIGH); // This should turn on the RED LED1
digitalWrite(yellow_LED1 , LOW);  // This should turn off the YELLOW LED1
 
digitalWrite(green_LED1, LOW);  // This should turn off the GREEN LED1

delay(1000); //Extended time for Red light#1 before the Green of the other side turns ON

// The next three lines of code turn on the red LED2 
digitalWrite(red_LED2, LOW);  // This should turn off the RED LED2
digitalWrite(yellow_LED2 , LOW); // This should turn off the YELLOW LED2
digitalWrite(green_LED2, HIGH); // This should turn on the GREEN LED2

delay(2000);  // wait for 1 second

// The next three lines of code turn on the red LED1
digitalWrite(red_LED1, HIGH); // This should turn on the RED LED1
digitalWrite(yellow_LED1 , LOW);  // This should turn off the YELLOW LED1
digitalWrite(green_LED1, LOW);  // This should turn off the GREEN LED1

// The next three lines of code turn on the red LED2
 
digitalWrite(red_LED2, LOW);  // This should turn off the RED LED2
digitalWrite(yellow_LED2 , HIGH); // This should turn on the YELLOW LED2
digitalWrite(green_LED2, LOW);  // This should turn off the GREEN LED2

delay(2000);  // wait for 1 second

// The next three lines of code turn on the red LED2

digitalWrite(red_LED2, HIGH); // This should turn on the RED LED2

digitalWrite(yellow_LED2 , LOW); // This should turn off the YELLOW LED2
digitalWrite(green_LED2, LOW);  // This should turn off the GREEN LED2

delay(1000); //Extended time for Red light#2 before the Green of the other side turns 

// The next three lines of code turn on the yellow LED1

digitalWrite(red_LED1, LOW);  // This should turn off the RED LED1

digitalWrite(yellow_LED1 , LOW);  // This should turn off the YELLOW LED1
digitalWrite(green_LED1, HIGH); // This should turn on the GREEN LED1
 
delay(2000);  // wait for 1 second

// The next three lines of code turn on the yellow LED1 
digitalWrite(red_LED1, LOW);  // This should turn off the RED LED1
digitalWrite(yellow_LED1 , HIGH); // This should turn on the YELLOW LED1
digitalWrite(green_LED1, LOW);  // This should turn off the GREEN LED1

// The next three lines of code turn on the red LED2

digitalWrite(red_LED2, HIGH); // This should turn on the RED LED2

digitalWrite(yellow_LED2 , LOW); // This should turn off the YELLOW LED2
digitalWrite(green_LED2, LOW);  // This should turn off the GREEN LED2
delay(2000);  // wait for 1 second

}// Emergency Button closing ============

}