Done

src/main/java/core/basesyntax/Application.java

@@ -3,5 +3,10 @@
 public class Application {
     public static void main(String[] args) {
         // create three balls using class Lottery and print information about them in console
+        Lottery lottery = new Lottery();
+
+        for (int i = 0; i < 3; i++) {
+            System.out.println(lottery.getRandomBall());
+        }
     }
 }

src/main/java/core/basesyntax/Ball.java

@@ -0,0 +1,34 @@
+package core.basesyntax;
+
+public class Ball {
+    private Color color;
+    private int number;
+
+    public Ball(Color color, int number) {
+        this.color = color;
+        this.number = number;
+    }
+
+    public Color getColor() {
+        return color;
+    }
+
+    public void setColor(Color color) {
+        this.color = color;
+    }
+
+    public int getNumber() {
+        return number;
+    }
+
+    public void setNumber(int number) {
+        this.number = number;
+    }
+
+    @Override
+    public String toString() {
+        return "Ball \n"
+                + "color: " + this.color + "\n"
+                + "number: " + this.number;
+    }
+}

src/main/java/core/basesyntax/Color.java

@@ -0,0 +1,10 @@
+package core.basesyntax;
+
+public enum Color {
+    RED,
+    GREEN,
+    BLUE,
+    BLACK,
+    WHITE,
+    PURPLE
+}

src/main/java/core/basesyntax/ColorSupplier.java

@@ -1,7 +1,11 @@
 package core.basesyntax;
 
+import java.util.Random;
+
 public class ColorSupplier {
-    public String getRandomColor() {
-        return null;
+    private final Random picker = new Random();
+
+    public Color getRandomColor() {
+        return Color.values()[picker.nextInt(Color.values().length)];
     }
 }

src/main/java/core/basesyntax/Lottery.java

@@ -0,0 +1,15 @@
+package core.basesyntax;
+
+import java.util.Random;
+
+public class Lottery {
+    private static final int MAX_NUMBER = 101;
+    private final Random number = new Random();
+    private final ColorSupplier colorSupplier = new ColorSupplier();
+
+    public Ball getRandomBall() {
+        Color color = colorSupplier.getRandomColor();
+
+        return new Ball(color, number.nextInt(MAX_NUMBER));
+    }
+}