Membuat Segitia Layang-Layang Unik

langsung aja ke kode yg ane buat gan :D
/*Author:RieqyNS13
Email:rieqyns13@hackermail.com*/
#include 
#include 
#include 
#include 
using namespace std;
int main()
{
    system("color 0A");
    system("TITLE looping Mas bro");
    unsigned long int loop, time, a=0, x;
    char set = ' ';
    cout<<"Input Looping = ";
    cin>>loop;
    cout<<"Input Interval = ";
    cin>>time;
    cout<<"Input Setfill Variabel = ";
    cin>>set;
    //Kalkulasi'_'//
    while(loop=loop-1)
    {
                      int t=loop+1;;
                      for(int a=1; a<=loop; a=a+1)
                      {
                              int c=a;
                              c=c*2;
                              t=t-1;
                              cout<nul");
    return 0;
}