Upon system reset, or at the start of a new game, the sequence length is set to one.

The sequence length corresponds to the user$$s score.

$-$ Upon system reset, and on each turn of gameplay, $$Simon$$ begins a level by

producing a tone on the buzzer and illuminating two segments of the $7-$segment

display $($see Table $1).$ Simon will play a tone and illuminate two segments for all

steps in the sequence determined in Section B$.$ Each step is active for $50\%$ of the

duration of the playback delay $($see Section C$),$ after which the buzzer is silent and

the $7-$segment display is blank, for the remainder of the playback delay. Following

this, the next step in the sequence will be active.

$-$ Once the sequence length is reached, the user must press the pushbuttons

corresponding to the steps in the same sequence. As each pushbutton is pressed,

the corresponding segments of the $7-$segment display are illuminated, and the

corresponding tone is sounded. This occurs for either: $50\%$ of the duration of the

playback delay, or the duration of the button press, whichever is longer.

$-$ If the user$$s sequence matches Simon$$s$,$ the SUCCESS pattern is displayed for the

playback delay. Finally, the sequence length, which is equal to the user$$s score, is

increased by one.

$-$ The next turn replicates the steps from the previous sequence, while appending an

additional step at the end.

$-$ The game repeats until the user fails to match Simon$$s sequence, or when the

maximum sequence length is reached.

$-$ The game ends as soon as an incorrect input is provided by the user. This causes the

FAIL pattern to be displayed for the playback delay, followed by the user$$s score,

which is also displayed for the playback delay. Following this, the $7-$segment display

will remain blank for the playback delay. After this, the sequence length is reset

back to one and a new game will begin.

$-$ The user$$s score is displayed as a decimal number between $0$ and $99,$ on the $7-$

segment display. In the unlikely event that a score exceeds $99,$ the two least

significant digits will be displayed. Leading zeroes will be shown only if the score

exceeds $99.$ For example, if the user$$s score is $8,8$ will be shown, however, if the

user$$s score is $108,08$ will be shown.

$-$ The SUCCESS pattern requires all $7$ segments on both displays to be illuminated.

$-$ The FAIL pattern requires the G segment on both displays to be illuminated.