How to avoid flashing in console in c and the trace of a moving character

I'm doing a project for the school that consists of drawing a picture using gotoxy and printing asterisks; The fact is that this box has to be moved if I press the arrow keys. I already managed to make the painting move, the problem is that it leaves a trace when moving and it constantly flashes, that happens with any text that it puts. My question is, how do I avoid blinking? It looks very ugly.

        #include<stdio.h>
        #include<stdlib.h>
        #include<windows.h>
        #include<conio.h>
        #define derecha 77
        #define izquierda 75
        #define abajo 80
        #define arriba 72
        #include<iostream>
        using namespace std;
        void gotoxy(int x, int  y)
        {
            COORD  pos = {x,y};
        SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE), pos);
        }

        int main()
        {
       int i,j,x,y,m=0,n=0;
           x=10;
       y = 10;
       bool fin = false;
       char tecla;

           while(!fin)
       {
        if(kbhit()) 
        {
          tecla = getch();

            if(tecla == derecha)m++;
            if(tecla == arriba) n--;
            if(tecla == abajo) n++;
            if(tecla == izquierda) m--;
                for(i=0+x; i<=6+x;i++)//cuadro 
                    {           
                        for(j=1+y; j<=3+y; j++)
                        {
                            gotoxy(i+m,j+n);
                            printf("+"); 
                        }
                    }
                  gotoxy(20,2); printf("presiona las flechas para mover el teclado");
        }   
    }
}