can't start seirra after STEP 5: Post Installation with MultiBeast

hi,
I am a complete beginner to hack macOS.
After I read the Guide, I try to install my customMac . Until yesterday, I successed install Sierra . Today ,I want to boot Sierra from harddrive, I followed the Installation Guide, after I post installation with multibeast ,I cant start Sierra. it stopped here.
please help


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