Day17

const int LEDPIN = 13;

int LEDSTATE = LOW;
unsigned long previousMillis = 0;
const long interval = 800;


void setup() {
  pinMode(LEDPIN, OUTPUT);

}

void loop() {
  unsigned long currentMillis = millis();
  if(currentMillis - previousMillis >= interval)
  {
    previousMillis = currentMillis;

    if (LEDSTATE == LOW)
    {
     LEDSTATE = HIGH;
     } else
        {
          LEDSTATE = LOW;
          };

     digitalWrite(LEDPIN, LEDSTATE);  
   }


}

the code didn't work as it didn't compile.

const int Button_int =0;
const int RED = 11;
const int GREEN = 10;
const int BLUE = 9;
boolean lastButtenstate = LOW;

volatile int selectedLED = RED;

void setup() {
  pinMode(RED ,OUTPUT);
  pinMode(GREEN ,OUTPUT);
  pinMode(BLUE ,OUTPUT);
  attachInterrupt(Button_int, swap, RISING);
}

void swap()
{
  analogWrite(selectedLED, 0);

  if(selectedLED == GREEN)
    selectedLED = RED;
    else if(selectedLED == RED)
    selectedLED = BLUE;
    else if(selectedLED == BLUE)
    selectedLED = GREEN;
 
}

boolean debounce()
{
  boolean Current = digitalRead(Button_int);
  if (Current === HIGH)
  { Delay(50);
    Current = digitalRead(Button_int);
    Current = HIGH;
   
    }
 
  }

void loop()
{
  for (int i=0; i <256; i++)
  {
    analogWrite(selectedLED, i);
    delay(10);
  }
  for(int i = 255; i >=0; i--)
  analogWrite(selectedLED, i);
  delay(10);
}

this is the one with the lights changing. it did work  and changed lights with teh interupts