The problem is with this line:
/#include <OneSheeld.h>
You accidentally added the slash. Change it to this:
#include <OneSheeld.h>
After that the next problem you will encounter is that the compiled size exceeds the program storage space of your Uno, a more difficult problem to resolve. The easiest solution would be to upgrade from your Uno to an Arduino Mega board. I don't see any obvious low hanging fruit for reducing the program memory usage of your sketch. I did find reducing the value of BUFFPIXEL and BUFFPIXEL_X3 to help a bit.