const int buttonPin1 = 7;
const int buttonPin2 = 8;
const int buttonPin3 = 9;

const int ledPin1 = 4;    //led in 1 but can't use serial if in that pin
const int ledPin2 = 5;    //led in 2 but can't use serial if in that pin
const int ledPin3 = 2;
const int ledPin4 = 3;

const int potPin = A1;

unsigned long minValue = 1000UL;  // 1 seconds in milliseconds (scaled to 0V)
unsigned long maxValue = 10000UL;  // 10 seconds in milliseconds (scaled to 5V)

int lastButtonState1 = 0;
int lastButtonState2 = 0;
int lastButtonState3 = 0;

int ledTrigger2 = 0;
int ledTrigger3 = 0;
int ledTrigger4 = 0;

int ledState1;
int ledState2;
int ledState3;
int ledState4;

int lastLedTrigger2 = 0;
int lastLedTrigger3 = 0;
int lastLedTrigger4 = 0;

unsigned long startTime1;
unsigned long startTime2;
unsigned long startTime3;
unsigned long startTime4;


void setup() {
  pinMode(buttonPin1, INPUT);
  pinMode(ledPin1, OUTPUT);
  pinMode(ledPin2, OUTPUT);
  pinMode(ledPin3, OUTPUT);
  pinMode(ledPin4, OUTPUT);
  Serial.begin(9600);
}
void loop()
{
  int potValue = analogRead(potPin);               // Read potentiometer value (0 to 1023)
  unsigned long mappedValue = map(potValue, 0, 1023, minValue, maxValue);
  Serial.println(mappedValue);
  delay(100);

  int buttonState1 = digitalRead(buttonPin1);
  if (buttonState1 == HIGH)
  {
    if (lastButtonState1 == 0)                    // lastButtonState starts as zero so this statement is true
    {
      ledState1 = 1;                                //turn ledState from 0 to 1
      startTime1 = millis();                        //start timer
    }
  }
  lastButtonState1 = buttonState1;                  //lastButtonState is zero but buttonState is high so lastButtonState is now 1
  if (ledState1)                                    //ledState is 1 now so this statement is true
  {
    if (millis() - startTime1 <= mappedValue)
      //Until the startTime reaches above the interval time the loop will choose this if statement rather than the else which turns off // the LED
    {
      digitalWrite(ledPin1, HIGH);                  //turns on the LED
    }
    else
    {
      digitalWrite(ledPin1, LOW);                   //turns off LED and resets the ledState
      ledState1 = 0;
      ledTrigger2 = 1;
    }
  }

  //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

  // LED 2 Sequence

  if (ledTrigger2 == 1)
  {
    if (lastLedTrigger2 == 0)
    {
      ledState2 = 1;
      startTime2 = millis();
    }
    lastLedTrigger2 = ledTrigger2;
    if (millis() - startTime2 <= mappedValue)
    {
      digitalWrite(ledPin2, HIGH);
    }
    else
    {
      digitalWrite(ledPin2, LOW);
      ledState2 = 0;
      ledTrigger2 = 0;
      lastLedTrigger2 = 0;
      ledTrigger3 = 1;
    }
  }

  //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

  // LED 3 sequence

  if (ledTrigger3 == 1)
  {
    if (lastLedTrigger3 == 0)
    {
      ledState3 = 1;
      startTime3 = millis();
    }
    lastLedTrigger3 = ledTrigger3;
    if (millis() - startTime3 <= mappedValue)
    {
      digitalWrite(ledPin3, HIGH);
    }
    else
    {
      digitalWrite(ledPin3, LOW);
      ledState3 = 0 ;
      ledTrigger3 = 0;
      lastLedTrigger3 = 0;
      ledTrigger4 = 1;
    }
  }


  ///////////////////////////////////////////////////////////////////////////////////////////////

  // LED 4 sequence

  if (ledTrigger4 == 1)
  {
    if (lastLedTrigger4 == 0)
    {
      ledState4 = 1;
      startTime4 = millis();
    }
    lastLedTrigger4 = ledTrigger4;
    if (millis() - startTime4 <= mappedValue)
    {
      digitalWrite(ledPin4, HIGH);
    }
    else
    {
      digitalWrite(ledPin4, LOW);
      ledState4 = 0;
      lastLedTrigger4 = 0;
      ledTrigger4 = 0;
    }
  }

}