smart parking system

const int led1=10,led2=11,led3=12,led4=13;
int one,two,three,four;
void setup() {
  
pinMode(led1,OUTPUT);
pinMode(led2,OUTPUT);
pinMode(led3,OUTPUT);
pinMode(led4,OUTPUT);
pinMode(4,INPUT);
pinMode(5,INPUT);
pinMode(6,INPUT);
pinMode(7,INPUT);
}

void loop() {

  while(1){
  if(digitalRead(4)==1)
  {
    digitalWrite(led1,HIGH);
  }
    else 
    {
      digitalWrite(led1,LOW);
    }

 if(digitalRead(5)==1)
  {
    digitalWrite(led2,HIGH);
  }
    else 
    {
      digitalWrite(led2,LOW);
    }
if(digitalRead(6)==1)
  {
    digitalWrite(led3,HIGH);
  }
    else 
    {
      digitalWrite(led3,LOW);
    }
if(digitalRead(7)==1)
  {
    digitalWrite(led4,HIGH);
  }
    else 
    {
      digitalWrite(led4,LOW);
    }


  }
    
}