led matrix

#define button 9

#define LED1 0

#define LED2 1

#define LED3 2

#define LED4 3

#define LED5 4

#define LED6 5

#define LED7 6

#define LED8 7

#define LED9 8

int state = 0;

int old =0;

int buttonPoll=0;

void setup(){

  pinMode (button,INPUT);

  pinMode(LED1,OUTPUT);

  pinMode(LED2,OUTPUT);

  pinMode(LED3,OUTPUT);

  pinMode(LED4,OUTPUT);

  pinMode(LED5,OUTPUT);

  pinMode(LED6,OUTPUT);

  pinMode(LED7,OUTPUT);

  pinMode(LED8,OUTPUT);

  pinMode(LED9,OUTPUT);

 

  digitalWrite(LED1, LOW);

  digitalWrite(LED2, LOW);

  digitalWrite(LED3, LOW);

  digitalWrite(LED4, LOW);

  digitalWrite(LED5, LOW); 

  digitalWrite(LED6, LOW);

  digitalWrite(LED7, LOW);

  digitalWrite(LED8, LOW);

  digitalWrite(LED9, LOW);

}

void loop(){

  buttonPoll = digitalRead(button);

  if(buttonPoll==1){

    delay(50);

    buttonPoll =digitalRead(button);

    if(buttonPoll==0){

      state=old+1;

  }}

  else{

  delay(100);

  }

  switch (state){

   case 1:

    digitalWrite(LED7,HIGH);

    digitalWrite(LED8,HIGH);

    digitalWrite(LED9,HIGH);

   

    old=state;

    break;

   case 2:

    digitalWrite(LED3,HIGH);

    digitalWrite(LED6,HIGH);

    digitalWrite(LED9,HIGH);

 

    

   

    old=state;

    break;

   case 3:

    

    old=state;

    break;

   default:

    

    old=0;

    break;

  }

}