diff --git a/src/main/java/sk/stuba/fei/uim/oop/ExamRT.java b/src/main/java/sk/stuba/fei/uim/oop/ExamRT.java
index 45e24a7..eb25bd4 100644
--- a/src/main/java/sk/stuba/fei/uim/oop/ExamRT.java
+++ b/src/main/java/sk/stuba/fei/uim/oop/ExamRT.java
@@ -1,7 +1,9 @@
 package sk.stuba.fei.uim.oop;
 
+import sk.stuba.fei.uim.oop.window.ExamWindow;
+
 public class ExamRT {
     public static void main(String[] args) {
-        
+        new ExamWindow();
     }
 }
diff --git a/src/main/java/sk/stuba/fei/uim/oop/chain/Chain.java b/src/main/java/sk/stuba/fei/uim/oop/chain/Chain.java
new file mode 100644
index 0000000..8879188
--- /dev/null
+++ b/src/main/java/sk/stuba/fei/uim/oop/chain/Chain.java
@@ -0,0 +1,34 @@
+package sk.stuba.fei.uim.oop.chain;
+
+import java.awt.*;
+import java.util.ArrayList;
+
+public class Chain {
+    private int length;
+    private ArrayList chainList;
+
+    public Chain(int length){
+        this.length = length;
+        this.chainList = new ArrayList<>();
+    }
+
+    public void addIntoChain(int x, int y){
+        if(chainList.size() == length){
+            chainList.remove(length-1);
+        }
+        Dimension d = new Dimension(x,y);
+        chainList.add(0,d);
+    }
+
+    public void setChainList(ArrayList newChainList){
+        this.chainList = newChainList;
+    }
+    public ArrayList getChainList(){
+        return this.chainList;
+    }
+
+    public int getLength(){
+        return this.chainList.size();
+    }
+
+}
diff --git a/src/main/java/sk/stuba/fei/uim/oop/objects/Circle.java b/src/main/java/sk/stuba/fei/uim/oop/objects/Circle.java
new file mode 100644
index 0000000..7a663ea
--- /dev/null
+++ b/src/main/java/sk/stuba/fei/uim/oop/objects/Circle.java
@@ -0,0 +1,14 @@
+package sk.stuba.fei.uim.oop.objects;
+
+import java.awt.*;
+
+public class Circle extends Object{
+    public Circle(int x, int y, int size){
+        super(x,y,size);
+    }
+    @Override
+    public void draw(Graphics g, Color color) {
+        g.setColor(color);
+        g.fillOval(x - size / 2,y - size / 2,size,size);
+    }
+}
diff --git a/src/main/java/sk/stuba/fei/uim/oop/objects/Clock.java b/src/main/java/sk/stuba/fei/uim/oop/objects/Clock.java
new file mode 100644
index 0000000..897356d
--- /dev/null
+++ b/src/main/java/sk/stuba/fei/uim/oop/objects/Clock.java
@@ -0,0 +1,20 @@
+package sk.stuba.fei.uim.oop.objects;
+
+import java.awt.*;
+
+public class Clock extends Object{
+    public Clock(int x, int y, int size){
+        super(x,y,size);
+    }
+    @Override
+    public void draw(Graphics g, Color color) {
+        g.setColor(color);
+        int[] xPoint = {x, x - size / 2, x + size / 2};
+        int[] yPoint = {y, y - size / 2, y - size / 2};
+        g.fillPolygon(xPoint,yPoint,3);
+
+        int[] xPoint2 = {x, x - size / 2, x + size / 2};
+        int[] yPoint2 = {y, y + size / 2, y + size / 2};
+        g.fillPolygon(xPoint2,yPoint2,3);
+    }
+}
diff --git a/src/main/java/sk/stuba/fei/uim/oop/objects/Object.java b/src/main/java/sk/stuba/fei/uim/oop/objects/Object.java
new file mode 100644
index 0000000..252812e
--- /dev/null
+++ b/src/main/java/sk/stuba/fei/uim/oop/objects/Object.java
@@ -0,0 +1,17 @@
+package sk.stuba.fei.uim.oop.objects;
+
+import java.awt.*;
+
+public abstract class Object {
+    protected int x;
+    protected int y;
+    protected int size;
+
+    public Object(int x, int y, int size){
+        this.x = x;
+        this.y = y;
+        this.size = size;
+    }
+
+    public abstract void draw(Graphics g, Color color);
+}
diff --git a/src/main/java/sk/stuba/fei/uim/oop/objects/Rectangle.java b/src/main/java/sk/stuba/fei/uim/oop/objects/Rectangle.java
new file mode 100644
index 0000000..a835540
--- /dev/null
+++ b/src/main/java/sk/stuba/fei/uim/oop/objects/Rectangle.java
@@ -0,0 +1,17 @@
+package sk.stuba.fei.uim.oop.objects;
+
+
+import java.awt.*;
+
+public class Rectangle extends Object{
+
+    public Rectangle(int x, int y, int size){
+        super(x,y,size);
+    }
+
+    @Override
+    public void draw(Graphics g, Color color) {
+        g.setColor(color);
+        g.fillRect(x - size / 2,y - size / 2,size,size);
+    }
+}
diff --git a/src/main/java/sk/stuba/fei/uim/oop/window/ExamWindow.java b/src/main/java/sk/stuba/fei/uim/oop/window/ExamWindow.java
new file mode 100644
index 0000000..64e1870
--- /dev/null
+++ b/src/main/java/sk/stuba/fei/uim/oop/window/ExamWindow.java
@@ -0,0 +1,247 @@
+package sk.stuba.fei.uim.oop.window;
+
+import sk.stuba.fei.uim.oop.chain.Chain;
+import sk.stuba.fei.uim.oop.objects.Circle;
+import sk.stuba.fei.uim.oop.objects.Clock;
+import sk.stuba.fei.uim.oop.objects.Object;
+import sk.stuba.fei.uim.oop.objects.Rectangle;
+
+import javax.swing.*;
+import java.awt.*;
+import java.awt.event.ItemEvent;
+import java.awt.event.ItemListener;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.util.ArrayList;
+import java.util.Hashtable;
+
+public class ExamWindow extends JFrame implements ItemListener {
+    private final JPanel canvas;
+    private final JSlider lengthSlider;
+    private final JSlider radiusSlider;
+    private final JSlider spacingSlider;
+    private final JComboBox<String> objectBox;
+    private Chain chain;
+    private int length;
+    private int radius;
+    private int spacing;
+    private int boxValue;
+
+    public ExamWindow(){
+        setTitle("ExamRT");
+        setSize(1000,700);
+        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+        setResizable(false);
+
+        boxValue = 0;
+
+        canvas = new JPanel() {
+            @Override
+            protected void paintComponent(Graphics g) {
+                super.paintComponent(g);
+                draw(g);
+            }
+        };
+        canvas.addMouseMotionListener(new MouseAdapter() {
+            @Override
+            public void mouseMoved(MouseEvent e) {
+                int x = e.getX();
+                int y = e.getY();
+                chain.addIntoChain(x, y);
+                canvas.repaint();
+            }
+        });
+
+        length = 50;
+        radius = 5;
+        spacing = 5;
+
+        JPanel leftMenu = new JPanel();
+        leftMenu.setLayout(new BorderLayout());
+
+        lengthSlider = new JSlider(JSlider.VERTICAL,0,18,3);
+        lengthSlider.setMajorTickSpacing(1);
+        lengthSlider.setPaintTicks(true);
+        lengthSlider.setSnapToTicks(true);
+        BoundedRangeModel lengthModel = lengthSlider.getModel();
+        lengthModel.addChangeListener(e -> {
+            if (!lengthModel.getValueIsAdjusting()) {
+                if(length>lengthSlider.getValue() * 10 + 20){
+                    length = lengthSlider.getValue() * 10 + 20;
+                    chain = new Chain(length);
+                    canvas.repaint();
+                } else{
+                    length = lengthSlider.getValue() * 10 + 20;
+                    Chain newChain = new Chain(length);
+                    newChain.setChainList(chain.getChainList());
+                    chain = newChain;
+                }
+            }
+        });
+
+        Hashtable<Integer, JLabel> lengthLabelTable = new Hashtable<>();
+        lengthLabelTable.put(0, new JLabel("20"));
+        lengthLabelTable.put(1, new JLabel("30"));
+        lengthLabelTable.put(2, new JLabel("40"));
+        lengthLabelTable.put(3, new JLabel("50"));
+        lengthLabelTable.put(4, new JLabel("60"));
+        lengthLabelTable.put(5, new JLabel("70"));
+        lengthLabelTable.put(6, new JLabel("80"));
+        lengthLabelTable.put(7, new JLabel("90"));
+        lengthLabelTable.put(8, new JLabel("100"));
+        lengthLabelTable.put(9, new JLabel("110"));
+        lengthLabelTable.put(10, new JLabel("120"));
+        lengthLabelTable.put(11, new JLabel("130"));
+        lengthLabelTable.put(12, new JLabel("140"));
+        lengthLabelTable.put(13, new JLabel("150"));
+        lengthLabelTable.put(14, new JLabel("160"));
+        lengthLabelTable.put(15, new JLabel("170"));
+        lengthLabelTable.put(16, new JLabel("180"));
+        lengthLabelTable.put(17, new JLabel("190"));
+        lengthLabelTable.put(18, new JLabel("200"));
+
+        lengthSlider.setLabelTable(lengthLabelTable);
+        lengthSlider.setPaintLabels(true);
+        leftMenu.add(lengthSlider, BorderLayout.WEST);
+
+
+        radiusSlider = new JSlider(JSlider.VERTICAL,0,19,4);
+        radiusSlider.setMajorTickSpacing(1);
+        radiusSlider.setPaintTicks(true);
+        radiusSlider.setSnapToTicks(true);
+
+        BoundedRangeModel radiusModel = radiusSlider.getModel();
+        radiusModel.addChangeListener(e -> {
+            if (!radiusModel.getValueIsAdjusting()) {
+                radius = radiusSlider.getValue() + 1;
+                canvas.repaint();
+            }
+        });
+
+        Hashtable<Integer, JLabel> radiusLabelTable = new Hashtable<>();
+        radiusLabelTable.put(0, new JLabel("1"));
+        radiusLabelTable.put(1, new JLabel("2"));
+        radiusLabelTable.put(2, new JLabel("3"));
+        radiusLabelTable.put(3, new JLabel("4"));
+        radiusLabelTable.put(4, new JLabel("5"));
+        radiusLabelTable.put(5, new JLabel("6"));
+        radiusLabelTable.put(6, new JLabel("7"));
+        radiusLabelTable.put(7, new JLabel("8"));
+        radiusLabelTable.put(8, new JLabel("9"));
+        radiusLabelTable.put(9, new JLabel("10"));
+        radiusLabelTable.put(10, new JLabel("11"));
+        radiusLabelTable.put(11, new JLabel("12"));
+        radiusLabelTable.put(12, new JLabel("13"));
+        radiusLabelTable.put(13, new JLabel("14"));
+        radiusLabelTable.put(14, new JLabel("15"));
+        radiusLabelTable.put(15, new JLabel("16"));
+        radiusLabelTable.put(16, new JLabel("17"));
+        radiusLabelTable.put(17, new JLabel("18"));
+        radiusLabelTable.put(18, new JLabel("19"));
+        radiusLabelTable.put(19, new JLabel("20"));
+
+        radiusSlider.setLabelTable(radiusLabelTable);
+        radiusSlider.setPaintLabels(true);
+        leftMenu.add(radiusSlider, BorderLayout.CENTER);
+
+        spacingSlider = new JSlider(JSlider.VERTICAL,0,19,4);
+        spacingSlider.setMajorTickSpacing(1);
+        spacingSlider.setPaintTicks(true);
+        spacingSlider.setSnapToTicks(true);
+
+        BoundedRangeModel spacingModel = spacingSlider.getModel();
+        spacingModel.addChangeListener(e -> {
+            if (!spacingModel.getValueIsAdjusting()) {
+                spacing = spacingSlider.getValue() + 1;
+                canvas.repaint();
+            }
+        });
+
+        Hashtable<Integer, JLabel> spacingLabelTable = new Hashtable<>();
+        spacingLabelTable.put(0, new JLabel("1"));
+        spacingLabelTable.put(1, new JLabel("2"));
+        spacingLabelTable.put(2, new JLabel("3"));
+        spacingLabelTable.put(3, new JLabel("4"));
+        spacingLabelTable.put(4, new JLabel("5"));
+        spacingLabelTable.put(5, new JLabel("6"));
+        spacingLabelTable.put(6, new JLabel("7"));
+        spacingLabelTable.put(7, new JLabel("8"));
+        spacingLabelTable.put(8, new JLabel("9"));
+        spacingLabelTable.put(9, new JLabel("10"));
+        spacingLabelTable.put(10, new JLabel("11"));
+        spacingLabelTable.put(11, new JLabel("12"));
+        spacingLabelTable.put(12, new JLabel("13"));
+        spacingLabelTable.put(13, new JLabel("14"));
+        spacingLabelTable.put(14, new JLabel("15"));
+        spacingLabelTable.put(15, new JLabel("16"));
+        spacingLabelTable.put(16, new JLabel("17"));
+        spacingLabelTable.put(17, new JLabel("18"));
+        spacingLabelTable.put(18, new JLabel("19"));
+        spacingLabelTable.put(19, new JLabel("20"));
+
+        spacingSlider.setLabelTable(radiusLabelTable);
+        spacingSlider.setPaintLabels(true);
+        leftMenu.add(spacingSlider, BorderLayout.EAST);
+
+        canvas.setBackground(Color.WHITE);
+        canvas.setPreferredSize(new Dimension(700,700));
+        setLayout(new BorderLayout());
+        add(canvas,BorderLayout.CENTER);
+        add(leftMenu,BorderLayout.WEST);
+
+
+        String[] values = {"CIRCLE", "RECTANGLE", "HOUR-GLASS"};
+        objectBox = new JComboBox<>(values);
+        objectBox.setSelectedIndex(0);
+        objectBox.addItemListener(this);
+        leftMenu.add(objectBox, BorderLayout.SOUTH);
+
+
+        setFocusable(true);
+        setVisible(true);
+
+        chain = new Chain(length);
+    }
+
+    private void draw(Graphics g){
+        ArrayList chainList = chain.getChainList();
+        int chainLen = chain.getLength();
+        if(chainLen > 0){
+            g.setColor(Color.RED);
+            for(int i=0; i<chainLen; ++i){
+                Dimension d1 = (Dimension) chainList.get(i);
+                if(i!=chainLen-1){
+                    Dimension d2 = (Dimension) chainList.get(i+1);
+                    g.drawLine(d1.width,d1.height,d2.width,d2.height);
+                }
+                if(i%spacing == 0 || i==0 || i==chainLen-1){
+                    Object o = null;
+
+                    if(boxValue==0){
+
+                        o = new Circle(d1.width,d1.height,radius*2);
+                    } else if (boxValue==1) {
+                        o = new Rectangle(d1.width,d1.height, radius*2);
+                    } else if(boxValue==2){
+                        o = new Clock(d1.width,d1.height,radius*2);
+                    }
+                    if (o != null){
+                        int val = 255/(chainLen+1);
+                        int red = 255-(val*i);
+                        int blue = 0+(val * i);
+                        Color color = new Color(red,0,blue);
+                        o.draw(g, color);
+                    }
+                }
+            }
+        }
+    }
+
+    @Override
+    public void itemStateChanged(ItemEvent e) {
+        if (e.getStateChange() == ItemEvent.SELECTED){
+            boxValue = objectBox.getSelectedIndex();
+            canvas.repaint();
+        }
+    }
+}