introduction our group would like to create a program with the help of a sensor which can monitor the frequency of blink, when people quickly blink two times (the sensor can monitor and calculate the time interval of each two times blinks, only when the time interval is within a certain numerical range, the screenshot can be captured) then screenshots can automatically be taken by your eyes, after viewing the whole movie, every audience can download their unique own screenshots on a website. So people can capture the movie's wonderful moments without using a mobile phone in a cinema and won’t bother others when lots of people are watching movie together.