Can you find the hidden triangle in this optical illusion

Time is a part of the measuring system used to sequence events, to compare the durations of events and the intervals between them, and to quantify rates of change such as the motions of objects.

Do you see two or three elegant women? Illusions that generally feature two figures whose contours match seamlessly the contours of another figure inducing the viewer with a mental choice of two interpretations, each of which is valid, are related to Rubin’s vase illusion, named after the Danish psychologist Edgar Rubin who introduced this illusion in his work 'Synsoplevede Figurer' ("Visual Figures") published around 1915.

During the Optical Art Movement of the 1960s, artists would create all sort of puzzling effects with color. For instance, this "flashing squares" drawing seems to wobble and flash when you concentrate on one particular area of the image. How many squares can you see in this diagram? Can you feel the "motion" of the image?

A tattoo is made by inserting indelible ink into the dermis layer of the skin to change the pigment. Tattoos on humans are a type of body modification, Arms is the perfect place to design a tattoo, you might never know when your tattoo might be spotted. At time when your finger pointing up or at time when your finger pointing downwards, On the left, you have a queen, but when you flip her upside down, you have a king

When you look at the circulation you can see the blood is flowing. This is caused by microsaccades or Eye moment, and the tiny moving thing is believed are after images of the black and white lines.