Added skeleton.

Aclock.c

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+/** @file
+  Aclock is an analog clock program for text mode console displays, terminals, or terminal emulators.
+  This program is obviously absolutely useless, except for turning your old, expensive mainframe or
+  supercomputer into a wall clock.
+
+  Copyright (c) 1994-2016 Antoni Sawicki <as@tenoware.com>
+  Copyright (c) 2016 Natalia Portillo <claunia@claunia.com>
+**/
+
+#include <Uefi.h>
+#include <Library/UefiApplicationEntryPoint.h>
+#include <Library/UefiLib.h>
+
+/**
+  as the real entry point for the application.
+
+  @param[in] ImageHandle    The firmware allocated handle for the EFI image.  
+  @param[in] SystemTable    A pointer to the EFI System Table.
+  
+  @retval EFI_SUCCESS       The entry point is executed successfully.
+  @retval other             Some error occurs when executing this entry point.
+
+**/
+EFI_STATUS
+EFIAPI
+UefiMain (
+  IN EFI_HANDLE        ImageHandle,
+  IN EFI_SYSTEM_TABLE  *SystemTable
+  )
+{
+  Print(L"Hello World \n"); 
+  return EFI_SUCCESS;
+}
+

Aclock.inf

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+## @file
+#  Aclock is an analog clock program for text mode console displays, terminals, or terminal emulators.
+#  This program is obviously absolutely useless, except for turning your old, expensive mainframe or
+#  supercomputer into a wall clock.
+#  
+#  Copyright (c) 1994-2016 Antoni Sawicki <as@tenoware.com>
+#  Copyright (c) 2016 Natalia Portillo <claunia@claunia.com>
+#  
+##
+
+[Defines]
+  INF_VERSION                    = 1.25
+  BASE_NAME                      = Aclock
+  FILE_GUID                      = 23825e7d-3da7-4201-836d-582d369b0986
+  MODULE_TYPE                    = UEFI_APPLICATION
+  VERSION_STRING                 = 1.0
+  ENTRY_POINT                    = UefiMain
+#
+# The following information is for reference only and not required by the build tools.
+#
+#  VALID_ARCHITECTURES           = IA32 X64 IPF EBC Etc...
+#
+
+[Sources]
+  Aclock.c
+
+[Packages]
+  MdePkg/MdePkg.dec
+  
+[LibraryClasses]
+  UefiApplicationEntryPoint
+  UefiLib
+  
+[Guids]
+
+[Ppis]
+
+[Protocols]
+
+[FeaturePcd]
+
+[Pcd]