int led1=13;
int led2=12;
int led3=11;
int button1=7;
int button2=6;
int button3=5;

void setup() {
pinMode(13,OUTPUT);
pinMode(12,OUTPUT);
pinMode(11,OUTPUT);
pinMode(7,INPUT);
pinMode(6,INPUT);
pinMode(5,INPUT);
}

void loop() {
byte button_state1=digitalRead(7);
byte button_state2=digitalRead(6);
byte button_state3=digitalRead(5);
if(button_state1==1){
  digitalWrite(13,HIGH);
}
else{
  digitalWrite(13,LOW);
}
if(button_state2==1){
  digitalWrite(12,HIGH);
}
else{
  digitalWrite(12,LOW);
}
if(button_state3==1){
  digitalWrite(11,HIGH);
}
else{
  digitalWrite(11,LOW);
}
}