diff --git a/7.x/P7.17 Purse/Cloud.java b/7.x/P7.17 Purse/Cloud.java
new file mode 100644
index 0000000..850285e
--- /dev/null
+++ b/7.x/P7.17 Purse/Cloud.java	
@@ -0,0 +1,34 @@
+import java.awt.Color;
+import java.awt.Graphics2D;
+import java.awt.geom.Ellipse2D;
+import java.awt.geom.Point2D;
+
+/**
+ Classe che rappresenta lo stato di una lampadina
+ @author radaelli11353
+*/
+public class Cloud {
+    public static final int DIAMETRO = 5;
+    private Point2D.Double[] punti;
+    private int nPunti;
+    
+    public Cloud() {
+        punti = new Point2D.Double[100];
+        nPunti = 0;
+    }
+    
+    public void add(Point2D.Double aPoint) {
+        if(nPunti >= punti.length) throw new IllegalArgumentException();
+        punti[nPunti] = aPoint;
+        nPunti++;
+    }
+    
+    public void draw(Graphics2D g2) {
+        for(int i = 0; i < nPunti; i++) {
+            Ellipse2D.Double punto = new Ellipse2D.Double(punti[i].getX(), punti[i].getY(), DIAMETRO, DIAMETRO);
+            g2.setColor(Color.RED);
+            g2.draw(punto);
+            g2.fill(punto);
+        }
+    }
+}
\ No newline at end of file
diff --git a/7.x/P7.17 Purse/CloudComponent.java b/7.x/P7.17 Purse/CloudComponent.java
new file mode 100644
index 0000000..e85b5e3
--- /dev/null
+++ b/7.x/P7.17 Purse/CloudComponent.java	
@@ -0,0 +1,28 @@
+import java.awt.Graphics;
+import java.awt.Graphics2D;
+import javax.swing.JComponent;
+import java.awt.geom.Point2D;
+import java.util.Random;
+
+/**
+ Classe che estende JComponent per creare un componente Lampadina
+ @author radaelli11353
+*/
+public class CloudComponent extends JComponent {
+    /**
+     Metodo paintComponent che si occupa di disegnare una lampadina
+     @param g Contesto grafico di Graphics
+    */
+    public void paintComponent(Graphics g) {
+        Graphics2D g2 = (Graphics2D) g;
+        Random generator = new Random();
+        
+        Cloud nuvola = new Cloud();
+        
+        for(int i = 0; i < 100; i++) {
+            nuvola.add(new Point2D.Double(generator.nextDouble()*400, generator.nextDouble()*400));
+        }
+        
+        nuvola.draw(g2);
+    }
+}
\ No newline at end of file
diff --git a/7.x/P7.17 Purse/CloudViewer.java b/7.x/P7.17 Purse/CloudViewer.java
new file mode 100644
index 0000000..1a03051
--- /dev/null
+++ b/7.x/P7.17 Purse/CloudViewer.java	
@@ -0,0 +1,24 @@
+import javax.swing.JFrame;
+
+/**
+ Classe che visualizza una lampadina tramite un JFrame e LampadinaComponent
+ @author radaelli11353
+*/
+public class CloudViewer {
+    /**
+     Metodo main di LampadinaViewer
+     @param args Argomenti passati all'esecuzione del programma
+    */
+    public static void main(String[] args) {
+        JFrame frame = new JFrame();
+        
+        frame.setSize(500, 500);
+        frame.setTitle("Visualizzatore nuvola");
+        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+        
+        CloudComponent component = new CloudComponent();
+        frame.add(component);
+        
+        frame.setVisible(true);
+    }
+}
\ No newline at end of file
diff --git a/7.x/P7.18 Polygon/Polygon.java b/7.x/P7.18 Polygon/Polygon.java
new file mode 100644
index 0000000..2b866e9
--- /dev/null
+++ b/7.x/P7.18 Polygon/Polygon.java	
@@ -0,0 +1,32 @@
+import java.awt.Graphics2D;
+import java.awt.geom.Point2D;
+import java.awt.geom.Line2D;
+
+/**
+ Classe che rappresenta lo stato di una lampadina
+ @author radaelli11353
+*/
+public class Polygon {
+    public static final int DIAMETRO = 5;
+    private Point2D.Double[] punti;
+    private int nPunti;
+    
+    public Polygon() {
+        punti = new Point2D.Double[100];
+        nPunti = 0;
+    }
+    
+    public void add(Point2D.Double aPoint) {
+        if(nPunti >= punti.length) throw new IllegalArgumentException();
+        punti[nPunti] = aPoint;
+        nPunti++;
+    }
+    
+    public void draw(Graphics2D g2) {
+        for(int i = 0; i < nPunti - 1; i++) {
+            Line2D.Double linea = new Line2D.Double(punti[i].getX(), punti[i].getY(), punti[i+1].getX(), punti[i+1].getY());
+            g2.draw(linea);
+        }
+        g2.draw(new Line2D.Double(punti[nPunti - 1].getX(), punti[nPunti - 1].getY(), punti[0].getX(), punti[0].getY()));
+    }
+}
\ No newline at end of file
diff --git a/7.x/P7.18 Polygon/PolygonComponent.java b/7.x/P7.18 Polygon/PolygonComponent.java
new file mode 100644
index 0000000..0ad79c1
--- /dev/null
+++ b/7.x/P7.18 Polygon/PolygonComponent.java	
@@ -0,0 +1,36 @@
+import java.awt.Graphics;
+import java.awt.Graphics2D;
+import javax.swing.JComponent;
+import java.awt.geom.Point2D;
+import java.util.Random;
+
+/**
+ Classe che estende JComponent per creare un componente Lampadina
+ @author radaelli11353
+*/
+public class PolygonComponent extends JComponent {
+    /**
+     Metodo paintComponent che si occupa di disegnare una lampadina
+     @param g Contesto grafico di Graphics
+    */
+    public void paintComponent(Graphics g) {
+        Graphics2D g2 = (Graphics2D) g;
+        
+        Polygon quadrato = new Polygon();
+        Polygon pentagono = new Polygon();
+        
+        quadrato.add(new Point2D.Double(0, 0));
+        quadrato.add(new Point2D.Double(50, 0));
+        quadrato.add(new Point2D.Double(50, 50));
+        quadrato.add(new Point2D.Double(0, 50));
+
+        pentagono.add(new Point2D.Double(100, 100));
+        pentagono.add(new Point2D.Double(70, 80));
+        pentagono.add(new Point2D.Double(50, 50));
+        pentagono.add(new Point2D.Double(150, 70));
+        pentagono.add(new Point2D.Double(120, 100));
+        
+        quadrato.draw(g2);
+        pentagono.draw(g2);
+    }
+}
\ No newline at end of file
diff --git a/7.x/P7.18 Polygon/PolygonViewer.java b/7.x/P7.18 Polygon/PolygonViewer.java
new file mode 100644
index 0000000..bb45650
--- /dev/null
+++ b/7.x/P7.18 Polygon/PolygonViewer.java	
@@ -0,0 +1,24 @@
+import javax.swing.JFrame;
+
+/**
+ Classe che visualizza una lampadina tramite un JFrame e LampadinaComponent
+ @author radaelli11353
+*/
+public class PolygonViewer {
+    /**
+     Metodo main di LampadinaViewer
+     @param args Argomenti passati all'esecuzione del programma
+    */
+    public static void main(String[] args) {
+        JFrame frame = new JFrame();
+        
+        frame.setSize(500, 500);
+        frame.setTitle("Visualizzatore poligono");
+        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+        
+        PolygonComponent component = new PolygonComponent();
+        frame.add(component);
+        
+        frame.setVisible(true);
+    }
+}
\ No newline at end of file