finished Main Screen Task DTSUD-52

sudokuExample/src/Main.java

@@ -11,6 +11,14 @@ public class Main {
             public void run() {
 
 
+                JFrame main = new JFrame();
+                main.setLayout(null);
+                main.setVisible(true);
+                main.setBounds(300, 300, 500, 500);
+
+                JPanel root = new JPanel();
+
+                main.setContentPane(root);
 
             }
         });