Hitchcock opening sequence of North by Northwest

North by Northwest Opening Sequence

In the first shot we see lines appearing from the right side and crossing with lines coming down from the top this creates a windowed building kind of look, like a grid, this works well as when the text comes in it can be in line with the grid, these lines are 'converging lines'

The next shot is of more actors, sliding up and down the grids as the names come up a little white line comes up with them and then goes without stopping unlike the text I think thats there just to add something on to the page as if it was by itself.

Then the north by northwest title appears and this works well as the arrows on the 'N's point in the direction of north and north west this is a good little add as it creates a noticeable effect.