Algorithm 2 DetectEvent algorithm

Require: $N\ge 2$ Require:  $x_z$ action performed by the player at the iteration z 1:$y_s\leftarrow$ ‘Standing’ 2:$y_w\leftarrow$ ‘Walking’ 3:$events\text{\_}list\leftarrow$ [] 4:$id\text{\_}event\leftarrow 0$ 5:$current\text{\_}state\leftarrow 0$ 6:while   $i\le N$ do 7:    if $x_i=y_s$ or $x_i=y_w$ then 8:        if $current\text{\_}state=1$ then 9:             $id\text{\_}event\leftarrow id\text{\_}event+1$ 10:           $events\text{\_}list\left[i\right]\leftarrow id\text{\_}event$ 11:        end if $current\text{\_}state=0$ 12:        $events\text{\_}list\left[i\right]\leftarrow id\text{\_}event$ 13:        $current\text{\_}state\leftarrow 1$ 14:    end if $x_i\ne y_s$ and $x_i\ne y_w$ 15:    $events\text{\_}list\left[i\right]\leftarrow id\text{\_}event$ 16:    $current\text{\_}state\leftarrow 0$ 17:end while