What do I do to pass the first trial

Hint 1 of 7:

If you try walking across, odds are you'll get killed.

Hint 2 of 7:

Indy will kneel whenever the blade starts coming at you.

Hint 3 of 7:

But the puzzle is to find where he will survive.

Hint 4 of 7:

Have you looked inside the print Diary?

Hint 5 of 7:

There's a picture of this same trial inside there.