diff --git a/Advanced Software Engineering/Advanced Software Engineering/Commander.cs b/Advanced Software Engineering/Advanced Software Engineering/Commander.cs
index 55f48a4..66d6883 100644
--- a/Advanced Software Engineering/Advanced Software Engineering/Commander.cs	
+++ b/Advanced Software Engineering/Advanced Software Engineering/Commander.cs	
@@ -103,6 +103,10 @@ namespace Advanced_Software_Engineering {
             return desc;
         }
 
+        public int GetNumberOfCommands() {
+            return commands.Count;
+        }
+
     }
 
 }
diff --git a/Advanced Software Engineering/Advanced Software Engineering/Windows/DrawPreview.cs b/Advanced Software Engineering/Advanced Software Engineering/Windows/DrawPreview.cs
index d082f16..6c6f443 100644
--- a/Advanced Software Engineering/Advanced Software Engineering/Windows/DrawPreview.cs	
+++ b/Advanced Software Engineering/Advanced Software Engineering/Windows/DrawPreview.cs	
@@ -31,7 +31,7 @@ namespace Advanced_Software_Engineering
             commander = new Commander(graphics);
         }
 
-        public Draw_Preview(String commands) {
+        public Draw_Preview(string commands) {
             InitializeComponent();
             SettingsAndHelperFunctions.NumberOfWindows++;
             graphics = panel1.CreateGraphics();
@@ -82,5 +82,9 @@ namespace Advanced_Software_Engineering
             return commander.ExplainCommands();
         }
 
+        public bool IsSuccess() {
+            return commander.GetNumberOfCommands() > 0;
+        }
+
     }
 }
diff --git a/Advanced Software Engineering/Advanced Software Engineering/Windows/TextEditor.cs b/Advanced Software Engineering/Advanced Software Engineering/Windows/TextEditor.cs
index 2ca5778..b506ce3 100644
--- a/Advanced Software Engineering/Advanced Software Engineering/Windows/TextEditor.cs	
+++ b/Advanced Software Engineering/Advanced Software Engineering/Windows/TextEditor.cs	
@@ -148,8 +148,11 @@ namespace Advanced_Software_Engineering {
                 DisplayForm.RemoveAllCommands();
                 DisplayForm.SubmitCommands(textBox1.Text);
             }
-            DisplayForm.Show();
-            DisplayForm.Focus();
+
+            if (DisplayForm.IsSuccess()) {
+                DisplayForm.Show();
+                DisplayForm.Focus();
+            }
         }
 
         public void CheckCode() {