const int led1 = A1;
const int led2 = A2;
const int led3 = A3;
// led pins

const int button = 9; // pushbutton pin

int de=250;  // delay time

int p=0;    // variable for pattern

int buttonState = 0; // state of my button

void setup() {
  // put your setup code here, to run once:
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);
  pinMode(button, INPUT);
  digitalWrite(led1, HIGH);
  delay(500);
  digitalWrite(led2, HIGH);
  delay(500);
  digitalWrite(led3, HIGH);
  delay(500);
  digitalWrite(led1, LOW);
  delay(500);
  digitalWrite(led2, LOW);
  delay(500);
  digitalWrite(led3, LOW);
  delay(500);
}

void loop() {

  buttonState = digitalRead(button);

  if (buttonState == LOW){
      p++;
      delay(2000);
    } 

  if(p==1){
   digitalWrite(led1,1); 
   digitalWrite(led2,0); 
   digitalWrite(led3,0); // turn led 1 on
    delay(de); 
  
   digitalWrite(led1,0); 
   digitalWrite(led2,1); 
   digitalWrite(led3,0); // turn led 2 on
    delay(de); 
  
   digitalWrite(led1,0); 
   digitalWrite(led2,0); 
   digitalWrite(led3,1); // turn led 3 on
    delay(de);
  }

  if(p==2){
   digitalWrite(led1,0); 
   digitalWrite(led2,0); 
   digitalWrite(led3,1); 
    delay(de); 
  
   digitalWrite(led1,0); 
   digitalWrite(led2,1); 
   digitalWrite(led3,0); 
    delay(de); 
  
   digitalWrite(led1,1); 
   digitalWrite(led2,0); 
   digitalWrite(led3,0); 
    delay(de);

  }

    if(p==3){
   digitalWrite(led1,1); 
   digitalWrite(led2,0); 
   digitalWrite(led3,0); 
    delay(de); 
  
   digitalWrite(led1,0); 
   digitalWrite(led2,1); 
   digitalWrite(led3,1); 
    delay(de); 
  
   digitalWrite(led1,0); 
   digitalWrite(led2,0); 
   digitalWrite(led3,1); 
    delay(de);

    digitalWrite(led1,1); 
   digitalWrite(led2,1); 
   digitalWrite(led3,0); 
    delay(de); 
  
   digitalWrite(led1,0); 
   digitalWrite(led2,1); 
   digitalWrite(led3,0); 
    delay(de); 

   digitalWrite(led1,1); 
   digitalWrite(led2,0); 
   digitalWrite(led3,1); 
    delay(de); 
    }

          if(p==4){
   digitalWrite(led1,1); 
   digitalWrite(led2,1); 
   digitalWrite(led3,1); 
    delay(de); 
  
   digitalWrite(led1,0); 
   digitalWrite(led2,0); 
   digitalWrite(led3,0); 
    delay(de); 
  
   digitalWrite(led1,1); 
   digitalWrite(led2,1); 
   digitalWrite(led3,1); 
    delay(de);

    digitalWrite(led1,0); 
   digitalWrite(led2,0); 
   digitalWrite(led3,0); 
    delay(de); 
    }

     if(p==5){
   digitalWrite(led1,0); 
   digitalWrite(led2,0); 
   digitalWrite(led3,0); 
    delay(de); 
  
   digitalWrite(led1,0); 
   digitalWrite(led2,0); 
   digitalWrite(led3,0); 
    delay(de); 
  
   digitalWrite(led1,0); 
   digitalWrite(led2,0); 
   digitalWrite(led3,0); 
    delay(de);

    p=0;//reinitialization of the patterns
    }

}