#define RED 12
#define BLUE 11
#define GREEN 9
#define SW 7
#define POT A0

#include <TaskScheduler.h>
// Scheduler
Scheduler ts;

void task1();
void task2();
void task3();

// set LED states
int REDS = LOW;
int brightness = 0;


// previous time for the tasks depending upon time.
unsigned long prevTime = millis(); 
unsigned long prevTimeSPPot = millis();
long timeIntervalASP = 3000;

// time intervals for the tasks
long timeRED = 1000;
long timeGREEN = 3000;

void setup()  
{  
  Serial.begin(9600);  
  pinMode(RED, OUTPUT);  
  pinMode(BLUE, OUTPUT);  
  pinMode(GREEN, OUTPUT);  
  pinMode(SW, INPUT_PULLUP);
  Serial.print("PROGRAM START");
}  

void loop() 
{
unsigned long curTime = millis();

task1();
task2();
task3();

}

void task1(){
  // Task 1 : Blink LED1 (T1)
unsigned long curTime = millis();
if(curTime - prevTime > timeRED) {
  prevTime = curTime;
  REDS=!REDS;
  digitalWrite(RED, REDS);
}
}

void task2(){
  // Task 2 : Glow LED2 when BTN is pressed
if(digitalRead(SW) ){
digitalWrite(BLUE, LOW);
}else{
digitalWrite(BLUE, HIGH);
}
}

void task3(){
  unsigned long curTime = millis();
  // Task 3 : Read input from serial monitor (0-255) and then write to LED3
  int potValue = analogRead(POT);
    if (curTime - prevTimeSPPot > timeIntervalASP) {
    prevTimeSPPot = curTime;
    Serial.print("Value : ");
    Serial.println(potValue);

    brightness = potValue;
    analogWrite(GREEN, brightness);
  }
}