// === Erin Woods ==== 

// 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 ============ 

}