diff --git a/exercise1/glsl/shader.frag b/exercise1/glsl/shader.frag
index eb0c3af..e43a608 100644
--- a/exercise1/glsl/shader.frag
+++ b/exercise1/glsl/shader.frag
@@ -5,6 +5,7 @@
 
 in vec4 fragment_color;
 in vec2 vertex_pos;
+in vec2 julia_position;
 
 out vec4 color;
 
@@ -15,7 +16,7 @@ const int i_max = 200;
 
 void main()
 {
-	vec2 z = vertex_pos * m;
+	vec2 z = julia_position * m;
 	int i;
 
 	for(i = 0; i < i_max; i++) {
diff --git a/exercise1/glsl/shader.vert b/exercise1/glsl/shader.vert
index 9e11959..4e76036 100644
--- a/exercise1/glsl/shader.vert
+++ b/exercise1/glsl/shader.vert
@@ -9,8 +9,11 @@ in vec4 in_color;
 uniform mat4 view;
 uniform mat4 proj;
 
+uniform vec2 julia_positions[3];
+
 out vec4 fragment_color;
 out vec2 vertex_pos;
+out vec2 julia_position;
 
 void main()
 {
@@ -18,4 +21,6 @@ void main()
 	gl_Position = proj * view * in_position;
 	
 	fragment_color = in_color;
+
+	julia_position = julia_positions[gl_VertexID];
 }
\ No newline at end of file
diff --git a/exercise1/include/Viewer.h b/exercise1/include/Viewer.h
index 650663d..8ee0c42 100644
--- a/exercise1/include/Viewer.h
+++ b/exercise1/include/Viewer.h
@@ -26,6 +26,13 @@ private:
 	nanogui::Slider* sldJuliaCY;
 	nanogui::Slider* sldJuliaZoom;	//Zoom factor for the Julia fractal
 
+	nanogui::Slider* point1X;	
+	nanogui::Slider* point1Y;	
+	nanogui::Slider* point2X;	
+	nanogui::Slider* point2Y;	
+	nanogui::Slider* point3X;	
+	nanogui::Slider* point3Y;	
+
 	// The following variables hold OpenGL object IDs
 	GLuint vertex_shader_id,	// ID of the vertex shader
 		fragment_shader_id,	// ID of the fragment shader
@@ -40,6 +47,8 @@ private:
 	GLint julia_m_id;
 	GLint julia_c_id;
 
+	GLint julia_pos_id;
+
 							// Read, Compile and link the shader codes to a shader program
 	void CreateShaders();
 	// Create and define the vertex array and add a number of vertex buffers
diff --git a/exercise1/src/Viewer.cpp b/exercise1/src/Viewer.cpp
index 6343e3e..eedd47b 100644
--- a/exercise1/src/Viewer.cpp
+++ b/exercise1/src/Viewer.cpp
@@ -15,6 +15,8 @@
 
 #include "glsl.h"
 
+using namespace nse::gui;
+
 Viewer::Viewer()
 	: AbstractViewer("CG1 Exercise 1")
 {
@@ -29,6 +31,8 @@ Viewer::Viewer()
 	julia_m_id = glGetUniformLocation(program_id, "m");
 	julia_c_id = glGetUniformLocation(program_id, "c");
 
+	julia_pos_id = glGetUniformLocation(program_id, "julia_positions");
+
 	modelViewMatrix.setIdentity();
 	projectionMatrix.setIdentity();
 
@@ -50,6 +54,13 @@ void Viewer::SetupGUI()
 	sldJuliaCY = nse::gui::AddLabeledSliderWithDefaultDisplay(mainWindow, "JuliaC.Y", std::make_pair(-1.0f, 1.0f), -0.3f, 2);
 	sldJuliaZoom = nse::gui::AddLabeledSliderWithDefaultDisplay(mainWindow, "Julia Zoom", std::make_pair(0.01f, 10.0f), 1.0f, 2);
 
+	point1X = AddLabeledSliderWithDefaultDisplay(mainWindow, "Point1.X", std::make_pair(-1.0f, 1.0f), 0.0f, 2);
+	point1Y = AddLabeledSliderWithDefaultDisplay(mainWindow, "Point1.Y", std::make_pair(-1.0f, 1.0f), 0.0f, 2);
+	point2X = AddLabeledSliderWithDefaultDisplay(mainWindow, "Point2.X", std::make_pair(-1.0f, 1.0f), -1.0f, 2);
+	point2Y = AddLabeledSliderWithDefaultDisplay(mainWindow, "Point2.Y", std::make_pair(-1.0f, 1.0f), -1.0f, 2);
+	point3X = AddLabeledSliderWithDefaultDisplay(mainWindow, "Point3.X", std::make_pair(-1.0f, 1.0f), 1.0f, 2);
+	point3Y = AddLabeledSliderWithDefaultDisplay(mainWindow, "Point3.Y", std::make_pair(-1.0f, 1.0f), 1.0f, 2);
+
 	performLayout();
 }
 
@@ -247,6 +258,13 @@ void Viewer::drawContents()
 	else
 		glDisable(GL_DEPTH_TEST);
 
+	// create uniform buffer for julia_positions
+	float julia_positions[6] = {
+		point1X->value(), point1Y->value(), 
+		point2X->value(), point2Y->value(),
+		point3X->value(), point3Y->value()
+	};
+
 	// Activate the shader program
 	glUseProgram(program_id);
 
@@ -262,6 +280,8 @@ void Viewer::drawContents()
 	glUniform1f(julia_m_id, juliaZoom);
 	glUniform2fv(julia_c_id, 1, juliaC.data());
 
+	glUniform2fv(julia_pos_id, 6, julia_positions);
+
 	// Bind the vertex array
 	glBindVertexArray(vertex_array_id);
 	// Draw the bound vertex array. Start at element 0 and draw 3 vertices