text: #ifndef __RAYTRACING_H
  #define __RAYTRACING_H
  
  #define UPPER_LIMIT 6000
  #include "objects.h"
  #include <stdint.h>
  
  //TODO
  /*You can modify raytracing prototype here
  * or create your new header*/
  /*
  void* raytracing(uint8_t *pixels, color background_color,
                  rectangular_node rectangulars, sphere_node spheres,
                  light_node lights, const viewpoint *view,
                  int width, int height);*/
  void* raytracing(void *data);
  #endif
  