Unexplained Phenomenon || Google Banner , Can you Explain It?

I cannot understand why it is called “Unexplained Phenomenon” some says, that Google scribbling on Google’s Main page. The Google’s account on Twitter displayed a note on encrypted memo.



“1.12.12 25.15.21.18 15 1.18.5 2.5.12.15.14.7 20.15 21.19 “, in this encrypted memo a commenter on that icon will be decoded to “All Your o Are Belong To Us”.