diff --git a/SelfPropelledArtilleryUnit/DrawningObjects/DrawningClamps.java b/SelfPropelledArtilleryUnit/DrawningObjects/DrawningClamps.java
index 13671f5..624c551 100644
--- a/SelfPropelledArtilleryUnit/DrawningObjects/DrawningClamps.java
+++ b/SelfPropelledArtilleryUnit/DrawningObjects/DrawningClamps.java
@@ -31,6 +31,80 @@ public class DrawningClamps implements IDrawable {
         setNum(numRollers);
     }
 
+    public DrawningClamps(){}
+
+    @Override
+    public void Draw(Graphics2D g2d, int startPosX, int startPosY, Color color){
+        this.color = color;
+        this.g2d = g2d;
+        this.startPosX = startPosX; 
+        this.startPosY = startPosY;
+
+        g2d.setPaint(Color.BLACK);
+        Ellipse2D ellipse7 = new Ellipse2D.Double(startPosX + 10, startPosY + 55, 120, 20);
+
+        Ellipse2D ellipse1 = new Ellipse2D.Double(startPosX + 5, startPosY + 50, 20, 20);
+        Ellipse2D ellipse2 = new Ellipse2D.Double(startPosX + 30, startPosY + 50, 20, 20);
+        Ellipse2D ellipse3 = new Ellipse2D.Double(startPosX + 55, startPosY + 50, 20, 20);
+        Ellipse2D ellipse4 = new Ellipse2D.Double(startPosX + 80, startPosY + 50, 20, 20);
+        Ellipse2D ellipse5 = new Ellipse2D.Double(startPosX + 105, startPosY + 50, 20, 20);
+        Ellipse2D ellipse6 = new Ellipse2D.Double(startPosX + 125, startPosY + 60, 10, 10);
+        g2d.draw(ellipse7);
+        switch (_numbeRollers) {
+            case Min:
+            g2d.fill(ellipse1);
+            g2d.fill(ellipse2);
+            g2d.fill(ellipse3);
+            g2d.fill(ellipse4);
+                break;
+            case Mid:
+            g2d.fill(ellipse1);
+            g2d.fill(ellipse2);
+            g2d.fill(ellipse3);
+            g2d.fill(ellipse4);
+            g2d.fill(ellipse5);
+                break;
+            case Max:
+            g2d.fill(ellipse1);
+            g2d.fill(ellipse2);
+            g2d.fill(ellipse3);
+            g2d.fill(ellipse4);
+            g2d.fill(ellipse5);
+            g2d.fill(ellipse6);
+                break;
+        }
+
+        Ellipse2D ellipse11 = new Ellipse2D.Double(startPosX + 10, startPosY + 55, 10, 10);
+        Ellipse2D ellipse12 = new Ellipse2D.Double(startPosX + 35, startPosY + 55, 10, 10);
+        Ellipse2D ellipse13 = new Ellipse2D.Double(startPosX + 60, startPosY + 55, 10, 10);
+        Ellipse2D ellipse14 = new Ellipse2D.Double(startPosX + 85, startPosY + 55, 10, 10);
+        Ellipse2D ellipse15 = new Ellipse2D.Double(startPosX + 110, startPosY + 55, 10, 10);
+        Ellipse2D ellipse16 = new Ellipse2D.Double(startPosX + 127, startPosY + 60, 5, 5);
+        g2d.setPaint(color);
+        switch (_numbeRollers) {
+            case Min:
+            g2d.fill(ellipse11);
+            g2d.fill(ellipse12);
+            g2d.fill(ellipse13);
+            g2d.fill(ellipse14);
+                break;
+            case Mid:
+            g2d.fill(ellipse11);
+            g2d.fill(ellipse12);
+            g2d.fill(ellipse13);
+            g2d.fill(ellipse14);
+            g2d.fill(ellipse15);
+                break;
+            case Max:
+            g2d.fill(ellipse11);
+            g2d.fill(ellipse12);
+            g2d.fill(ellipse13);
+            g2d.fill(ellipse14);
+            g2d.fill(ellipse15);
+            g2d.fill(ellipse16);
+                break;
+        }
+    }
     @Override
     public void Draw(){
         g2d.setPaint(Color.BLACK);
diff --git a/SelfPropelledArtilleryUnit/DrawningObjects/DrawningNails.java b/SelfPropelledArtilleryUnit/DrawningObjects/DrawningNails.java
index 5287c6c..d9d31a5 100644
--- a/SelfPropelledArtilleryUnit/DrawningObjects/DrawningNails.java
+++ b/SelfPropelledArtilleryUnit/DrawningObjects/DrawningNails.java
@@ -31,6 +31,80 @@ public class DrawningNails implements IDrawable {
         setNum(numRollers);
     }
 
+    public DrawningNails(){}
+    
+    @Override
+    public void Draw(Graphics2D g2d, int startPosX, int startPosY, Color color){
+        this.color = color;
+        this.g2d = g2d;
+        this.startPosX = startPosX; 
+        this.startPosY = startPosY;
+
+        g2d.setPaint(Color.BLACK);
+        Ellipse2D ellipse7 = new Ellipse2D.Double(startPosX + 10, startPosY + 55, 120, 20);
+
+        Ellipse2D ellipse1 = new Ellipse2D.Double(startPosX + 5, startPosY + 50, 20, 20);
+        Ellipse2D ellipse2 = new Ellipse2D.Double(startPosX + 30, startPosY + 50, 20, 20);
+        Ellipse2D ellipse3 = new Ellipse2D.Double(startPosX + 55, startPosY + 50, 20, 20);
+        Ellipse2D ellipse4 = new Ellipse2D.Double(startPosX + 80, startPosY + 50, 20, 20);
+        Ellipse2D ellipse5 = new Ellipse2D.Double(startPosX + 105, startPosY + 50, 20, 20);
+        Ellipse2D ellipse6 = new Ellipse2D.Double(startPosX + 125, startPosY + 60, 10, 10);
+        g2d.draw(ellipse7);
+        switch (_numbeRollers) {
+            case Min:
+            g2d.fill(ellipse1);
+            g2d.fill(ellipse2);
+            g2d.fill(ellipse3);
+            g2d.fill(ellipse4);
+                break;
+            case Mid:
+            g2d.fill(ellipse1);
+            g2d.fill(ellipse2);
+            g2d.fill(ellipse3);
+            g2d.fill(ellipse4);
+            g2d.fill(ellipse5);
+                break;
+            case Max:
+            g2d.fill(ellipse1);
+            g2d.fill(ellipse2);
+            g2d.fill(ellipse3);
+            g2d.fill(ellipse4);
+            g2d.fill(ellipse5);
+            g2d.fill(ellipse6);
+                break;
+        }
+
+        Ellipse2D ellipse11 = new Ellipse2D.Double(startPosX + 15, startPosY + 62, 2, 2);
+        Ellipse2D ellipse12 = new Ellipse2D.Double(startPosX + 40, startPosY + 62, 2, 2);
+        Ellipse2D ellipse13 = new Ellipse2D.Double(startPosX + 65, startPosY + 62, 2, 2);
+        Ellipse2D ellipse14 = new Ellipse2D.Double(startPosX + 90, startPosY + 62, 2, 2);
+        Ellipse2D ellipse15 = new Ellipse2D.Double(startPosX + 115, startPosY + 62, 2, 2);
+        Ellipse2D ellipse16 = new Ellipse2D.Double(startPosX + 130, startPosY + 65, 1, 1);
+        g2d.setPaint(color);
+        switch (_numbeRollers) {
+            case Min:
+            g2d.fill(ellipse11);
+            g2d.fill(ellipse12);
+            g2d.fill(ellipse13);
+            g2d.fill(ellipse14);
+                break;
+            case Mid:
+            g2d.fill(ellipse11);
+            g2d.fill(ellipse12);
+            g2d.fill(ellipse13);
+            g2d.fill(ellipse14);
+            g2d.fill(ellipse15);
+                break;
+            case Max:
+            g2d.fill(ellipse11);
+            g2d.fill(ellipse12);
+            g2d.fill(ellipse13);
+            g2d.fill(ellipse14);
+            g2d.fill(ellipse15);
+            g2d.fill(ellipse16);
+                break;
+        }
+    }
     @Override
     public void Draw(){
 
diff --git a/SelfPropelledArtilleryUnit/DrawningObjects/DrawningRollers.java b/SelfPropelledArtilleryUnit/DrawningObjects/DrawningRollers.java
index eb270c8..e535877 100644
--- a/SelfPropelledArtilleryUnit/DrawningObjects/DrawningRollers.java
+++ b/SelfPropelledArtilleryUnit/DrawningObjects/DrawningRollers.java
@@ -30,11 +30,52 @@ public class DrawningRollers implements IDrawable{
         setNum(numRollers);
     }
 
+    public DrawningRollers(){}
+
+    @Override
+    public void Draw(Graphics2D g2d, int startPosX, int startPosY, Color color){
+        this.color = color;
+        this.g2d = g2d;
+        this.startPosX = startPosX; 
+        this.startPosY = startPosY;
+
+        g2d.setPaint(Color.BLACK);
+        Ellipse2D ellipse7 = new Ellipse2D.Double(startPosX + 10, startPosY + 55, 120, 20);
+        Ellipse2D ellipse1 = new Ellipse2D.Double(startPosX + 5, startPosY + 50, 20, 20);
+        Ellipse2D ellipse2 = new Ellipse2D.Double(startPosX + 30, startPosY + 50, 20, 20);
+        Ellipse2D ellipse3 = new Ellipse2D.Double(startPosX + 55, startPosY + 50, 20, 20);
+        Ellipse2D ellipse4 = new Ellipse2D.Double(startPosX + 80, startPosY + 50, 20, 20);
+        Ellipse2D ellipse5 = new Ellipse2D.Double(startPosX + 105, startPosY + 50, 20, 20);
+        Ellipse2D ellipse6 = new Ellipse2D.Double(startPosX + 125, startPosY + 60, 10, 10);
+        g2d.draw(ellipse7);
+        switch (_numbeRollers) {
+            case Min:
+            g2d.fill(ellipse1);
+            g2d.fill(ellipse2);
+            g2d.fill(ellipse3);
+            g2d.fill(ellipse4);
+                break;
+            case Mid:
+            g2d.fill(ellipse1);
+            g2d.fill(ellipse2);
+            g2d.fill(ellipse3);
+            g2d.fill(ellipse4);
+            g2d.fill(ellipse5);
+                break;
+            case Max:
+            g2d.fill(ellipse1);
+            g2d.fill(ellipse2);
+            g2d.fill(ellipse3);
+            g2d.fill(ellipse4);
+            g2d.fill(ellipse5);
+            g2d.fill(ellipse6);
+                break;
+        }
+    }
     @Override
     public void Draw(){
         g2d.setPaint(Color.BLACK);
         Ellipse2D ellipse7 = new Ellipse2D.Double(startPosX + 10, startPosY + 55, 120, 20);
-
         Ellipse2D ellipse1 = new Ellipse2D.Double(startPosX + 5, startPosY + 50, 20, 20);
         Ellipse2D ellipse2 = new Ellipse2D.Double(startPosX + 30, startPosY + 50, 20, 20);
         Ellipse2D ellipse3 = new Ellipse2D.Double(startPosX + 55, startPosY + 50, 20, 20);
diff --git a/SelfPropelledArtilleryUnit/DrawningObjects/DrawningSPAU.java b/SelfPropelledArtilleryUnit/DrawningObjects/DrawningSPAU.java
index c3739b2..35ff331 100644
--- a/SelfPropelledArtilleryUnit/DrawningObjects/DrawningSPAU.java
+++ b/SelfPropelledArtilleryUnit/DrawningObjects/DrawningSPAU.java
@@ -63,7 +63,7 @@ public class DrawningSPAU {
         }
         EntitySPAU = new EntitySPAU(speed, weight, bodyColor);
     }
-    public DrawningSPAU(EntitySPAU sPAU,IDrawable roll, int width, int height)
+    public DrawningSPAU(EntitySPAU sPAU, IDrawable roll, int width, int height)
     {   if (this.carHeight >= height)
         {
             return;
@@ -132,7 +132,8 @@ public class DrawningSPAU {
             Path2D.Double path = new Path2D.Double();
             
             //гусеницы
-            Rollers = new DrawningRollers(g2d, startPosX, startPosY, bodyColor, _numbeRollers);
+            if (Rollers == null){
+                Rollers = new DrawningRollers(g2d, startPosX, startPosY, bodyColor, _numbeRollers);
             switch (rollVar) {
                 case 2:
                     Rollers = new DrawningClamps(g2d, startPosX, startPosY, bodyColor, _numbeRollers);
@@ -142,9 +143,12 @@ public class DrawningSPAU {
                     break;
                 default:
                     break;
+                }
+                Rollers.Draw();
+            }
+            else{
+                Rollers.Draw(g2d, startPosX, startPosY, bodyColor);
             }
-
-            Rollers.Draw();
         
             // пушка
             path.moveTo(startPosX + 35, startPosY + 40);
diff --git a/SelfPropelledArtilleryUnit/DrawningObjects/IDrawable.java b/SelfPropelledArtilleryUnit/DrawningObjects/IDrawable.java
index 21cf889..fde58c3 100644
--- a/SelfPropelledArtilleryUnit/DrawningObjects/IDrawable.java
+++ b/SelfPropelledArtilleryUnit/DrawningObjects/IDrawable.java
@@ -1,6 +1,10 @@
 package SelfPropelledArtilleryUnit.DrawningObjects;
 
+import java.awt.Color;
+import java.awt.Graphics2D;
+
 public interface IDrawable {
     public void setNum(int num);
     public void Draw();
+    public void Draw(Graphics2D g2d, int startPosX, int startPosY, Color color);
 }
diff --git a/SelfPropelledArtilleryUnit/FormHard.java b/SelfPropelledArtilleryUnit/FormHard.java
new file mode 100644
index 0000000..07efaf0
--- /dev/null
+++ b/SelfPropelledArtilleryUnit/FormHard.java
@@ -0,0 +1,98 @@
+package SelfPropelledArtilleryUnit;
+import javax.swing.*;
+
+import SelfPropelledArtilleryUnit.DrawningObjects.DrawningClamps;
+import SelfPropelledArtilleryUnit.DrawningObjects.DrawningNails;
+import SelfPropelledArtilleryUnit.DrawningObjects.DrawningRollers;
+import SelfPropelledArtilleryUnit.DrawningObjects.DrawningSPAU;
+import SelfPropelledArtilleryUnit.DrawningObjects.IDrawable;
+import SelfPropelledArtilleryUnit.Entities.EntitySPAU;
+import SelfPropelledArtilleryUnit.Generics.RandomParts;
+
+import java.awt.*;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.util.Random;
+public class FormHard {
+    private JFrame frameMain;
+    private JPanel panelMain;
+    private JButton buttonCreate;
+    private RandomParts<EntitySPAU, IDrawable> generator;
+
+    public FormHard() {
+        InitializeComponent();
+        Random rand = new Random();
+        // макс. кол-во вариаций форм дверей/видов автобуса
+        int maxCnt = rand.nextInt(5, 11);
+        generator = new RandomParts<>(maxCnt, maxCnt, panelMain.getWidth(), panelMain.getHeight());
+        // добавление в массивы с дверьми/сущностями рандомные варианты
+        for (int i = 0; i < maxCnt; i++) {
+            generator.Add(createRandomEntitySPAU());
+            generator.Add(createRandomDop());    
+        }
+    }
+
+    private void InitializeComponent() {
+        //Само окно
+        frameMain = new JFrame("Усложнённая лаб 3");
+        frameMain.setSize(900, 500);
+        frameMain.setLayout(new BorderLayout());
+        frameMain.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+        
+        //Панель, на которой отрисовывается
+        panelMain = new JPanel();
+        panelMain.setLayout(null);
+
+        buttonCreate = new JButton("Создать");
+        buttonCreate.setBounds(10,400,150,30);
+
+        buttonCreate.addActionListener(new ActionListener() {
+            public void actionPerformed(ActionEvent e) {
+                createRandomDrawingBus(e);
+            }
+        });
+
+        frameMain.add(panelMain, BorderLayout.CENTER);
+        panelMain.add(buttonCreate);
+        frameMain.setVisible(true);         
+    }
+
+    private void Draw(DrawningSPAU drawingSPAU){
+        if (drawingSPAU == null) {
+            return;
+        }
+        Graphics g = panelMain.getGraphics();
+        // Очистка перед перерисовкой
+        panelMain.paint(g);
+        drawingSPAU.DrawTransport(g);
+    }
+
+    private void createRandomDrawingBus(ActionEvent e) {
+        DrawningSPAU drawingBus = generator.CreateObject();
+        drawingBus.SetPosition(50, 50); 
+        Draw(drawingBus);   
+    }
+
+    private EntitySPAU createRandomEntitySPAU() {
+        Random rand = new Random();
+        Color color = new Color(rand.nextInt(0, 256), rand.nextInt(0, 256), rand.nextInt(0, 256));
+        EntitySPAU entityBus = new EntitySPAU(rand.nextInt(100, 300), rand.nextDouble(1000, 3000), color);
+        return entityBus;        
+    }
+    private IDrawable createRandomDop() {
+        IDrawable dops;
+        Random rand = new Random();
+        int shape = rand.nextInt(1, 3);
+        if (shape == 1) {
+            dops = new DrawningClamps();
+        }
+        else if (shape == 2) {
+            dops = new DrawningNails();
+        }
+        else {
+            dops = new DrawningRollers();
+        } 
+        dops.setNum(rand.nextInt(4, 6));
+        return dops;
+    }
+}
diff --git a/SelfPropelledArtilleryUnit/SelfPropelledArtilleryUnit.java b/SelfPropelledArtilleryUnit/SelfPropelledArtilleryUnit.java
index aaaadc4..e57b07b 100644
--- a/SelfPropelledArtilleryUnit/SelfPropelledArtilleryUnit.java
+++ b/SelfPropelledArtilleryUnit/SelfPropelledArtilleryUnit.java
@@ -5,6 +5,7 @@ public class SelfPropelledArtilleryUnit {
     public static void main(String[] args) {
         SwingUtilities.invokeLater(() -> {
             FormSPAUCollection form = new FormSPAUCollection();
+            FormHard formHard = new FormHard();
             form.setSize(900, 500);
             form.setVisible(true);
         });