void setup(){
int button=10;
pinMode(button, INPUT_PULLUP);
for(int val=2; val<=9; val++){
pinMode(val, OUTPUT);
}
}

void loop()
{
for(int x=2; x<=9; x++){
digitalWrite(x, HIGH);
delay(500)
;digitalWrite(x,LOW);
}
for(int x=2; x<=9; x++){
digitalWrite(x, LOW);
}
}