diff --git a/main.cpp b/main.cpp
index 4f50f1e..fbd2a20 100644
--- a/main.cpp
+++ b/main.cpp
@@ -34,7 +34,7 @@ void loadTexture (GLuint& imageTexture1)
       cout << "image empty" << endl;
   } else {
       cout << "loaded " << image_path << endl;
-      //flip(image, image, 1);
+      flip(image, image, 0);
 #if (CV_VERSION_MAJOR >= 4)
       cvtColor(image, image, cv::COLOR_BGR2RGB);
 #else
@@ -89,10 +89,10 @@ void display(void)
   glBindTexture(GL_TEXTURE_2D, imageTexture);
 
   glBegin(GL_QUADS);  // front face
-  glTexCoord2f(0.0f, 0.0f); glVertex3f(1.0f, -1.0f, 0.0f);  //bottom right
-  glTexCoord2f(1.0f, 0.0f); glVertex3f(1.0f, 1.0f, 0.0f);   //top right
-  glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, 1.0f, 0.0f);  //top left
-  glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, -1.0f, 0.0f); //bottom left
+    glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f, -1.0f, 0.0f);  //bottom right
+    glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f,  1.0f, 0.0f);   //top right
+    glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f,  1.0f, 0.0f);  //top left
+    glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, -1.0f, 0.0f); //bottom left
   glEnd();
   glDisable(GL_TEXTURE_2D);
   glutSwapBuffers();