#include <stdio.h>
#include <wiringPi.h>
#include <stdlib.h>

int main (void){
    wiringPiSetup();
    int n, i, a[4];
    printf("Enter a number between 0 and 15: ");
    scanf("%d",&n);

    for(i=0;n>0;i++){
        a[i] = n%2;
        n=n/2;
    }




    for(i=3;i>=0;i--){
        if(a[i] == 1){
            pinMode(i, OUTPUT);
            digitalWrite(i, HIGH);

        }
    }

    delay(5000);

    for(i=3;i>=0;i--){
        if(a[i] == 1){
            pinMode(i, OUTPUT);
            digitalWrite(i, LOW);

        }
    }

    return 0;
}