int button1 = 10 ;
int button_state ;
int led1 = 11 ;
int button2 = 5 ;
int led2 = 8 ;

void setup() {
  // put your setup code here, to run once:
pinMode(led1, OUTPUT);
pinMode(button1, INPUT_PULLUP);
pinMode(led2, OUTPUT);
pinMode(button2, INPUT_PULLUP);
}

void loop() {
  // put your main code here, to run repeatedly:
  button_state = digitalRead(button1);
  digitalWrite(led1, ! button_state);

   button_state = digitalRead(button2);
    digitalWrite(led2, ! button_state);
}