There are 6 frames. The full cycle animation (all 6 frames) takes 42 seconds. Thus, we delay each frame and its title: the first one takes no delay, the second one 7 seconds, the third 14 seconds and so on until the last frame of 35 seconds delay.
We use different animation for the titles and the images. Since we give perspective to the 'demo-block', there is an illusion of 3D movement when the title is translated in Z-plane.
When the animation reachs the last frame, it jumps to the first frame and starts again.