In this program speed is very important as the locations do not remain highlighted on the screen for that long.
When the display time has elapsed, the selected locations will lose their highlight and become indistinguishable from the rest.
Your task is to tell the computer which of the locations you had previously been shown. To do this you move the pointer around the screen - placing it on each of the locations that you have just seen and pressing the left button - 'SELECT'.
When you have selected any of the cells the computer will indicate whether you are correct or not by displaying either a tick meaning *YES* or a cross meaning *NO* in place of the cover. The program will continue until you have either selected all the correct items or made enough errors to suggest that you are making wild guesses.