diff --git a/src/main.c b/src/main.c
index 1bf4254..a5a2693 100644
--- a/src/main.c
+++ b/src/main.c
@@ -14,10 +14,11 @@ static const char * const vertex_shader = "#version 330 core\n				\
 		layout (location = 1) in vec2 aTexCoord;\n\
 		out vec2 texCoord;\n\
 		out vec3 vertPos;\n							\
+		uniform float zoom;\n\
 		void main()\n						\
 		{\n							\
 		    gl_Position = vec4(aPos.x, aPos.y, aPos.z, 1.0);\n	\
-		    texCoord = aTexCoord;\n\
+		    texCoord = aTexCoord / zoom;\n\
 		    vertPos = aPos;\n\
 		}\n";
 
@@ -30,7 +31,7 @@ static const char * const orange_framgment_shader = "  \
 		\n				\
 		void main()\n			\
 		{\n				\
-		    FragColor = texture(ourTexture, texCoord); //+ vec4(vertPos.x, -vertPos.x, vertPos.y, 0.0);\n \
+		    FragColor = texture(ourTexture, texCoord);\n\
 		}";
 
 struct canvas_buffer {
@@ -207,10 +208,10 @@ static int calculate_mandelbrot(struct canvas_buffer *buff)
 
 float vertices[] = {
     // Vertex			Texture
-    -1.0f, -1.0f, 0.0f,		0.0f, 0.0f,		// bottom left
-     -1.0f, 1.0f, 0.0f,		0.0f, 1.0f,		// top left
-     1.0f,  -1.0f, 0.0f,	1.0f, 0.0f,		// bottom right
-     1.0f, 1.0f, 0.0f,		1.0f, 1.0f,		// top right
+    -0.95f, -0.95f, 0.0f,		0.0f, 0.0f,		// bottom left
+     -0.95f, 0.95f, 0.0f,		0.0f, 1.0f,		// top left
+     0.95f,  -0.95f, 0.0f,		1.0f, 0.0f,		// bottom right
+     0.95f,  0.95f, 0.0f,		1.0f, 1.0f,		// top right
 };
 
 unsigned int indices[] = {
@@ -226,13 +227,17 @@ static unsigned int texture_id;
 
 gboolean render(GtkGLArea *gl_area, GdkGLContext *context, gpointer user_data)
 {
+	int zoom_loc;
+	static float zoom = 1.0f;
 
 	gtk_gl_area_make_current(gl_area);
 
 	glClear(GL_COLOR_BUFFER_BIT);
 
 	glUseProgram(shader_program_id);
-	//glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
+	zoom_loc = glGetUniformLocation(shader_program_id, "zoom");
+	glUniform1f(zoom_loc, zoom);
+	glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
 	glBindTexture(GL_TEXTURE_2D, texture_id);
 	glBindVertexArray(vertex_array_object);
 	//glDrawArrays(GL_TRIANGLES, 0, 3);
@@ -254,7 +259,7 @@ void realize(GtkGLArea *gl_area, gpointer user_data)
 	char info_log[512];
 
 	gtk_gl_area_make_current(gl_area);
-	glClearColor(0, 0, 0, 1);
+	glClearColor(0.2, 0.2, 0.2, 1);
 
 	glGenVertexArrays(1, &vertex_array_object);
 	glBindVertexArray(vertex_array_object);
@@ -346,20 +351,20 @@ int main(int argc, char **argv)
 	g_signal_connect(window, "delete-event", G_CALLBACK(on_main_window_close), NULL);
 
 
-	mandelbrot_buff.x_span = 0.05;//2.8;
-	mandelbrot_buff.y_span = 0.05;//2.25;
+	mandelbrot_buff.x_span = 0.1;//2.8;
+	mandelbrot_buff.y_span = 0.1;//2.25;
 	mandelbrot_buff.center_x = -0.6;
 	mandelbrot_buff.center_y = 0.44;
-	mandelbrot_buff.width = 5000;
-	mandelbrot_buff.height = 5000;
-	mandelbrot_buff.iterations = 600;
+	mandelbrot_buff.width = 4000;
+	mandelbrot_buff.height = 4000;
+	mandelbrot_buff.iterations = 1000;
 	mandelbrot_buff.mandelbrot_buffer = NULL;
 
 	printf("Compile and run Mandelbrot on OpenCL HW\n");
 	start = clock();
 	calculate_mandelbrot(&mandelbrot_buff);
 	end = clock();
-	printf("Calculation finished. Time needed: %lf ms\n", ((double) (end - start)) / CLOCKS_PER_SEC * 1000.0);
+	printf("Calculation finished. Time needed: %lf ms\n", ((double)(end - start)) / CLOCKS_PER_SEC * 1000.0);
 
 
 	gl_area = GTK_GL_AREA(gtk_gl_area_new());
@@ -377,7 +382,6 @@ int main(int argc, char **argv)
 	gtk_gl_area_make_current(gl_area);
 
 	printf("Gui will be displayed\n");
-
 	gtk_main();
 
 	return 0;