Fronto~ creates sequences of random numbers between 0 and 9 and letters between A to Z. There are a number of different levels and the sequence remains on the screen for a certain amount of time to allow the user to memorize it.
Once the sequence disappears the user has to replicate it within a set time. Points are scored depending on correct answers and the time taken to answer.
All number and letter sequences are generated randomly at midnight so the game can be played every day. Sequences are the same for everyone.