<big>Here are some optical illusions I found. Under the picture It'll tell you what to do.
Look at the four black dots for 5 scconds.
Stare at the pluse sign in the middle. You will see the circle slowly disapper...
Try to count the number of black dots on the image below...
Do you see any words? Try tilting your head to the right.
Is the following object physically possible?</big>

Look at the four black dots for 5 scconds.

Stare at the pluse sign in the middle. You will see the circle slowly disapper...

Try to count the number of black dots on the image below...

Do you see any words? Try tilting your head to the right.

Is the following object physically possible?</big>