Coolest thing i saw this week

accompanying text is "一番手前の15歯の歯車が2回転したら元に戻ります。
よろしかったら歯車のハートもご覧になって下さい。"

which translated by google is
"The front two of the 15 teeth of the gear when the former returns to the rotation.
If you like to see the gear is in the heart, please.
Please look at the Gear's heart"

so i took a look at Gear's Heart(video below)