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Are they spirals or circles?
Stare at the cross and you will see a green dot circling.
Stare at the black dot in the middle, and you will find the clouds of colours will disappear.
Stare at the blue dot in the centre and it will disappear slowly.
Are the two lines equal?
Are they round or not?
Are they square or not?
Are they straight lines or not?
Grid sparkle illusion – the dots don’t exist at all.
Are the green and purple dots the same size?
What will happen if you stare at the little black dot in the centre, moving your head back and forth?
Is it spinning?
Are they moving?
Do you see a vase or two faces?
What can you see in the centre of the flowers?
Can you see three faces?
Can you find 9 persons?
How many pairs of faces are there in the picture?
Einstein or some bathing women?
Old faces or young people?
Can you find a lion?
Can you see a baby?
A girl or a witch?
Can you see Napoléon ?
How many persons can you see?
How many persons can you see?
13 or 12 people ?
How many squares does each of the triangle have ?
An impossible bird cage.
end
Music:Schumann Traumerei
Slides by Tess