concept for buttoneer

/*
Thebuttonomatic
*/

//pin numbers:
const int led1 = 2;
const int led2 = 3;
const int led3 = 4;
const int led4 = 5;
const int led5 = 6;
const int btn1 = 7;
const int btn2 = 8;
const int btn3 = 9;
const int btn4 = 10;

// variables
int btn = 0;
int btns1 = 0;
int btns2 = 0;
int btns3 = 0;
int btns4 = 0;

void setup() {
pinMode(led1, OUTPUT);
pinMode(led2, OUTPUT);
pinMode(led3, OUTPUT);
pinMode(led4, OUTPUT);
pinMode(led5, OUTPUT);
pinMode(btn1, INPUT);
pinMode(btn2, INPUT);
pinMode(btn3, INPUT);
pinMode(btn4, INPUT);
}

void loop() {
btn = 0;
digitalWrite(led1, LOW);
digitalWrite(led2, LOW);
digitalWrite(led3, LOW);
digitalWrite(led4, LOW);
digitalWrite(led5, LOW);

btns1 = digitalRead(btn1);
btns2 = digitalRead(btn2);
btns3 = digitalRead(btn3);
btns4 = digitalRead(btn4);

if (btns1 == HIGH) {
	btn = +1;
}
if (btns2 == HIGH) {
	btn = +1;
}
if (btns3 == HIGH) {
	btn = +1;
}
if (btns4 == HIGH) {
	btn = +1;
}

if (btn == 4){
	//Servo and led5
}

if (btn == 1 ){
	digitalWrite(led1, HIGH);
}
if (btn == 2 ){
	digitalWrite(led1, HIGH);
	digitalWrite(led2, HIGH);
}
if (btn == 3 ){
	digitalWrite(led1, HIGH);
	digitalWrite(led2, HIGH);
	digitalWrite(led3, HIGH);
}
else if (btn < 0) {
}


}