int SDL_main(int argc, char* argv[]){
             debug=fopen("debug.txt", "wt"); /* Archivo de depuracion*/
             Init("HOLA"); /* Inicio SDL. Funcion propia*/
             IMG fondo; /* IMG=SDL_Surface*/
             RECT r;  /*RECT=SDL_Rect*/
             RECT r1;
             RECT r2;
             RECT r3;
             Uint8 key;
             int x;
             int y;
             SDL_Event event;
             bool played=false;
 
             IMG boton;
             IMG boton2;
             IMG boton3;
 
             int opcion;
             draw(fondo, "burbujas_640x480.bmp", 0, 0, r); /* Funcion para dibujar*/
             draw(boton, "Play.bmp", 50, 350, r1);
             getch();
             while(true){
          		 SDL_PollEvent(&event);
			  if(event.type==SDL_QUIT) { exit(0); }
                          key=SDL_GetMouseState(&x, &y); /* Leo el estado del mouse*/
                         if(x>=r1.x && x<=r1.x+48 && y>=r1.y && y<=r1.y+48 && key==SDL_BUTTON_LMASK){
                                     fprintf(debug, "%s\n", "Pulsado");
                                     getch();
                                     draw(boton3, "Play3.bmp", 50, 350, r3);
                                     Sync();
                                     repr();
                                     }
                         i if(x>=r1.x && x<=r1.x+48 && y>=r1.y && y<=r1.y+48 && key!=SDL_BUTTON_LMASK){
                                     fprintf(debug, "%s\n", "Sobre el");
                                     draw(boton3, "Play2.bmp", 50, 350, r2);
                                     Flip(screen);
                                     Sync();
                                     }
                         }
             getch();
             END();
             return 0;
             }