HelloWorld example

diff --git a/examples/01.HelloWorld.c b/examples/01.HelloWorld.c
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+++ b/examples/01.HelloWorld.c
@@ -0,0 +1,90 @@
+/* c-irrlicht --- C bindings for Irrlicht Engine
+
+   Copyright (C) 2019 Javier Sancho <jsf@jsancho.org>
+
+   This file is part of c-irrlicht.
+
+   c-irrlicht is free software; you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 3 of the
+   License, or (at your option) any later version.
+
+   c-irrlicht is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with guile-irrlicht.  If not, see
+   <http://www.gnu.org/licenses/>.
+*/
+
+#include <cirrlicht/cirrlicht.h>
+#include <stddef.h>
+
+int main()
+{
+  // create irrlicht window
+  irr_core_dimension2d_u32 windowSize = {640, 480};
+  irr_IrrlichtDevice *device =
+    irr_createDevice(irr_video_EDT_SOFTWARE, &windowSize, 16,
+                     0, 0, 0);
+
+  if (!device)
+    {
+      return 1;
+    }
+
+  // set window caption
+  irr_IrrlichtDevice_setWindowCaption(device, "Hello World! - Irrlicht Engine Demo");
+
+  // instances for doing things
+  irr_video_IVideoDriver* driver = irr_IrrlichtDevice_getVideoDriver(device);
+  irr_scene_ISceneManager* smgr = irr_IrrlichtDevice_getSceneManager(device);
+  irr_gui_IGUIEnvironment* guienv = irr_IrrlichtDevice_getGUIEnvironment(device);
+
+  // add a static text
+  irr_core_rect_s32 box = {10, 10, 260, 22};
+  irr_gui_IGUIEnvironment_addStaticText(guienv,
+                                        "Hello World! This is the Irrlicht Software renderer!",
+                                        &box, 1, 1, NULL, -1, 0);
+
+  // load a quake2 mesh
+  irr_scene_IAnimatedMesh* mesh = irr_scene_ISceneManager_getMesh(smgr, "media/sydney.md2");
+  if (!mesh)
+    {
+      irr_IrrlichtDevice_drop(device);
+      return 1;
+    }
+  irr_scene_IAnimatedMeshSceneNode* node =
+    irr_scene_ISceneManager_addAnimatedMeshSceneNode(smgr, mesh, NULL, -1,
+                                                     NULL, NULL, NULL, 0);
+
+  if (node)
+    {
+      irr_scene_IAnimatedMeshSceneNode_setMaterialFlag(node, irr_video_EMF_LIGHTING, 0);
+      irr_scene_IAnimatedMeshSceneNode_setMD2Animation(node, irr_scene_EMAT_STAND);
+      irr_video_ITexture* texture = irr_video_IVideoDriver_getTexture(driver,
+                                                                      "media/sydney.bmp");
+      irr_scene_IAnimatedMeshSceneNode_setMaterialTexture(node, 0, texture);
+    }
+
+  // camera
+  irr_core_vector3df position = {0, 30, -40};
+  irr_core_vector3df lookat = {0, 5, 0};
+  irr_scene_ISceneManager_addCameraSceneNode(smgr, NULL, &position, &lookat,
+                                             -1, 1);
+                                             
+  // loop
+  irr_video_SColor bgcolor = {255, 100, 101, 140};
+  while (irr_IrrlichtDevice_run(device))
+    {
+      irr_video_IVideoDriver_beginScene(driver, 1, 1, &bgcolor, NULL, NULL);
+      irr_gui_IGUIEnvironment_drawAll(guienv);
+      irr_scene_ISceneManager_drawAll(smgr);
+      irr_video_IVideoDriver_endScene(driver);
+    }
+
+  irr_IrrlichtDevice_drop(device);
+  return 0;
+}

diff --git a/examples/media/sydney.bmp b/examples/media/sydney.bmp
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diff --git a/examples/media/sydney.md2 b/examples/media/sydney.md2
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