Small circles seem to appear and disappear spontaneously as the eye is moved over them.

This visual popping activity is due to our visual system which is constantly searching for the best interpretation in this unorganized pattern.

stare intently at the red dot in the center of the left block for about a couple of minutes.
Once you've done this, look over to the center of the right block. It should act weird - by fading out and 'flickering'. If you move your head closer and further from the monitor (while focussing in the center), you should see some interesting interference effects too.

Keep staring at the blue dot in the middle of the picture. The blue dot will shrink slowly and then disappear completely.

This eye trick bases off of a pattern, and it works pretty good!
the black dots in the square is moving continiusly from upward to downward and downward to upward and from left to right and then right to left, the square in the middle of the image it look quite dizzle also

Just like you did for the other Illusions before, stare intently at the red dot in the center of the left block for about a couple of minutes. Once you've done this, look over to the center of the right block. It should act weird - by fading out and 'flickering'. If you move your head closer and further from the monitor (while focussing in the center), you should see some interesting interference effects too.

One type of motion illusion is a type of optical illusion in which a static image appears to be moving due to the cognitive effects of interacting color contrasts and shape position.

Wow! Try staring at this for more than 5 seconds without going crazy. Then try following it round! =) Curves constantly die out and then re-evolve as part of another curve. This dots never stops rotating.

If you look around in the neighboring figure you will notice the appearance and disappearance of black dots at the crossings.Even though this figure looks similar to the Hermann-Grid, it is markedly more vivid. Furthermore, the effect is probably caused by different mechanisms than those causing the Hermann-Grid effect.1993: First demonstrated by JR Bergen at the ARVO, in a weaker variant1994: Re-discovered by Bernd Lingelbach’s wife Elke1995: Demonstrated at the Tübingen ECVP meeting (Schrauf M, Lingelbach B, Lingelbach E & Wist ER. The Hermann grid and the scintillation effect. Perception 24: suppl, 88–89)1997: Schrauf M, Lingelbach B & Wist E. The scintillating grid illusion. Vision Res 37:1033–1038, 2001: Invoked to explain Florida’s election problems (“Count the black dots, recount to confirm…” ;-)
Question: Do the streets or the squares influence the colour of the apparent disks?As you notice in the neighbouring figure, red streets leave the disks black. But if the squares are red (move mouse over figure), the disks acquire a reddish tint...