int btn1 = 2;              // switch is connected to pin 2
int led1=8;
int led2=9;
int led3=10;
int led4=11;
int led5=12;
int ledVal=LOW;
int val;                        // variable for reading the pin status
int val2;
int btnState;             // how many times the button has been pressed
boolean lightOn;
long previousMillis = 0; 

// interval at which to blink (milliseconds)
long interval = 200;  
void setup() {
  pinMode(btn1, INPUT);    // Set the switch pin as input
  pinMode(led1, OUTPUT);   
  pinMode(led2, OUTPUT);   
  pinMode(led3, OUTPUT);   
  pinMode(led4, OUTPUT);   
  pinMode(led5, OUTPUT);   
  lightOn=false;
  btnState = digitalRead(btn1);   // read the initial state
  // store last time LED was updated


}


void loop(){
  val = digitalRead(btn1);      // read input value and store it in val
  delay(10);
  val2 = digitalRead(btn1);     // read the input again to check for 
  if (val == val2) {  
    if (val != btnState) {          // the button state has changed!
      if (val == HIGH) {             // check if the button is pressed
        lightOn=!lightOn;
      }
    }
    if(lightOn){
      if (millis() - previousMillis > interval) {

        // remember the last time you blinked the LED
        //by setting previousMillis to millis()
        previousMillis=millis();
        if (ledVal==LOW){
          ledVal=HIGH;
        }
        else{
          ledVal=LOW;
        }

        digitalWrite(led1,ledVal);
        digitalWrite(led2,ledVal);
        digitalWrite(led3,ledVal);
        digitalWrite(led4,ledVal);
        digitalWrite(led5,ledVal);
      } 
    }
    else{
      digitalWrite(led1,LOW);
      digitalWrite(led2,LOW);
      digitalWrite(led3,LOW);
      digitalWrite(led4,LOW);
      digitalWrite(led5,LOW);
      previousMillis = 0; 

    }

    btnState = val;                 // save the new state in our variable
  }
}

int btn1 = 2;              // switch is connected to pin 2
int led1=8;
int led2=9;
int led3=10;
int led4=11;
int led5=12;
int ledVal=LOW;
int val;                        // variable for reading the pin status
int val2;
int btnState;             // how many times the button has been pressed
int lightOn;
long previousMillis = 0; 

// interval at which to blink (milliseconds)
long interval = 200;  
void setup() {
  pinMode(btn1, INPUT);    // Set the switch pin as input
  pinMode(led1, OUTPUT);   
  pinMode(led2, OUTPUT);   
  pinMode(led3, OUTPUT);   
  pinMode(led4, OUTPUT);   
  pinMode(led5, OUTPUT);   
  lightOn=0;
  btnState = digitalRead(btn1);   // read the initial state
  // store last time LED was updated


}


void loop(){
  val = digitalRead(btn1);      // read input value and store it in val
  delay(10);
  val2 = digitalRead(btn1);     // read the input again to check for bounces
  if (val == val2) {  
    if (val != btnState) {          // the button state has changed!
      if (val == HIGH) {   
        if (lightOn<3){
          lightOn++;
        }
        else{
          lightOn=0;
        }
      }
    }
    
    
    if(lightOn==1){
      interval=200;
    }
    if(lightOn==2){
      interval=500;
    }
    if(lightOn==3){
      interval=1000;
    }
    if(lightOn>0){
    if (millis() - previousMillis > interval) {

      // remember the last time you blinked the LED
      //by setting previousMillis to millis()
      previousMillis=millis();
      if (ledVal==LOW){
        ledVal=HIGH;
      }
      else{
        ledVal=LOW;
      }

      digitalWrite(led1,ledVal);
      digitalWrite(led2,ledVal);
      digitalWrite(led3,ledVal);
      digitalWrite(led4,ledVal);
      digitalWrite(led5,ledVal);
    }
  }

  
  }
  btnState = val;                 // save the new state in our variable
  
}