int led1 = 13;
int led2 = 12;
int led3 = 8;
int led4 = 9;
int led5 = 7;
int sw1 = 2;
bool sw_state=0,last_sw_state,buttonstate=1,change=0;
bool state=0;
unsigned long time1;
int debounceDelay=40;
bool LED1State=0;
unsigned long delayTime1;
unsigned long delayA0;

void setup() 
{
  pinMode(led1,OUTPUT);  
  pinMode(led2,OUTPUT); 
  pinMode(led3,OUTPUT);
  pinMode(led4,OUTPUT);
  pinMode(led5,OUTPUT);
  pinMode(sw1,INPUT_PULLUP);  
  Serial.begin(115200);
}

void loop() 
{
  checkSW();
  if(state==0)
  { 
    digitalWrite(led1,HIGH);
    digitalWrite(led2,HIGH);
    digitalWrite(led3,HIGH);
    digitalWrite(led4,HIGH);
    digitalWrite(led5,HIGH);
    
  } 
  else
  { 
    digitalWrite(led1,LOW);
    digitalWrite(led2,LOW);
    digitalWrite(led3,LOW);
    digitalWrite(led4,LOW);
    digitalWrite(led5,LOW);

  }
  
  if ((millis() - delayTime1) > 10000)
  {
   LED1State=!LED1State;
   digitalWrite(led1, LED1State);
   delayTime1=millis();
   LED1State=!LED1State;
   digitalWrite(led2, LED1State);
   delayTime1=millis();
   LED1State=!LED1State;
   digitalWrite(led3, LED1State);
   delayTime1=millis();
   LED1State=!LED1State;
   digitalWrite(led4, LED1State);
   delayTime1=millis();
  }

  if ((millis() - delayA0) > 10000)
  {
   int sensorValue = analogRead(A0);
   float volt = sensorValue*5.0/1024;
   Serial.print("ADC:");
   Serial.print(sensorValue);
   Serial.print(" volt:");
   Serial.println(volt);
   delayA0=millis();
  }
}                                                                     


void checkSW()
{
  sw_state=digitalRead(sw1);
  if(sw_state!= last_sw_state)
  {
    time1=millis();
  }
  if((millis()-time1)>debounceDelay)
  {
    if(buttonstate!=sw_state)
    {
    buttonstate=sw_state;
    change=1;
    }   
  }

  if((buttonstate==0)&&(change==1))
  {
    state=!state; 
    change=0;
  }
  if((buttonstate==1)&&(change==1))
  {
    change=0;
  }
  last_sw_state=sw_state;
}