Update Simplest.py

Author: Priyatham10

samples/Simplest.py

@@ -12,13 +12,15 @@
 
 Application.Initialize()
 Application.Title = "Hello Delphi FMX"
-Application.MainForm = Form(Application)
-Application.MainForm.SetProps(Caption = "Hello World")
-msg = Label(Application.MainForm)
-msg.SetProps(Parent = Application.MainForm,
+main_window = Form(Application)
+Application.MainForm = main_window
+
+main_window.SetProps(Caption = "Hello World")
+msg = Label(main_window)
+msg.SetProps(Parent = main_window,
     Text = "Hello Python from Delphi FMX",
     Position = Position(PointF(20, 20)),
     Width = 200)
-Application.MainForm.Show()
+main_window.Show()
 Application.Run() # This is the main loop
-Application.MainForm.Destroy()
+main_window.Destroy()