Arduino IDE Fehler beim kom­pi­lie­ren words.h:6:28: error: redefinition of 'const int es_Pixels [2]

Hallo,

Ich habe folgendes Problem:
Wenn ich diesen Sketch versuche zu kom­pi­lie­ren bekomme ich folgende 
Fehlermeldung:

[code]
In file included from 
C:\Users\user\AppData\Local\Temp\arduino_build_704596\sketch\clock_set.c 
pp:2:0:

words.h:6:28: error: redefinition of 'const int es_Pixels [2]'

 const int es_Pixels[es_Size] = {0,1};

                            ^

In file included from 
C:\Users\user\AppData\Local\Temp\arduino_build_704596\sketch\clock_set.h 
:3:0,

                 from 
C:\Users\user\AppData\Local\Temp\arduino_build_704596\sketch\clock_set.c 
pp:1:

C:\Users\user\AppData\Local\Temp\arduino_build_704596\sketch\words.h:6:1 
1:  note: 'const int es_Pixels [2]' previously defined here

 const int es_Pixels[es_Size] = {0,1};

           ^
[code]