belah ketupat

public class NewClass {

    public static void main(String[]args){

        int l = 1;

        int tingkat = 10;

        int n = 10/2;

        for(int i=1;i<=n;i++){

            for(int k=n;k>i;k--){

                System.out.print(" ");

            }

            for(int j=1;j<=l;j++){

                System.out.print("0");

            }

            l+=2;

            System.out.println("");

        }

        l -= 4;

        for(int i=(n-1);i>=1;i--){

            for(int k=i;k<=(n-1);k++){

                System.out.print(" ");

            }

            for(int j=l;j>=1;j--){

                System.out.print("0");

            }

            l-=2;

            System.out.println("");

        }

    }

}