added solution

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

@@ -3,5 +3,12 @@
 public class Application {
     public static void main(String[] args) {
         // create three balls using class Lottery and print information about them in console
+        Lottery ballOne = new Lottery();
+        Lottery ballTwo = new Lottery();
+        Lottery ballThree = new Lottery();
+
+        System.out.println(ballOne.getRandomBall().toString());
+        System.out.println(ballTwo.getRandomBall().toString());
+        System.out.println(ballThree.getRandomBall().toString());
     }
 }

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

@@ -0,0 +1,30 @@
+package core.basesyntax;
+
+public class Ball {
+
+    private String color;
+    private int number;
+
+    public String getColor() {
+        return color;
+    }
+
+    public void setColor(String color) {
+        this.color = color;
+    }
+
+    public int getNumber() {
+        return number;
+    }
+
+    public void setNumber(int number) {
+        this.number = number;
+    }
+
+    @Override
+    public String toString() {
+        return "Ball: "
+                + "color - " + color
+                + "; number - " + number;
+    }
+}

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

@@ -1,7 +1,12 @@
 package core.basesyntax;
 
+import java.util.Random;
+
 public class ColorSupplier {
     public String getRandomColor() {
-        return null;
+        Random random = new Random();
+        Colors[] colors = Colors.values();
+        int indexOfRandom = random.nextInt(colors.length);
+        return colors[indexOfRandom].toString();
     }
 }

src/main/java/core/basesyntax/Colors.java

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

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

@@ -0,0 +1,18 @@
+package core.basesyntax;
+
+import java.util.Random;
+
+public class Lottery {
+
+    Ball getRandomBall() {
+        Ball ball = new Ball();
+        ColorSupplier colorSupplier = new ColorSupplier();
+        String color = colorSupplier.getRandomColor();
+        ball.setColor(color);
+
+        Random random = new Random();
+        int ballIndex = random.nextInt(101);
+        ball.setNumber(ballIndex);
+        return ball;
+    }
+}