The Memory (aka Concentration) Game - The Essential Guide to HTML5 - page 163

firstcard = i;

…Set firstcard to
reference the card in
the deck

firstpick = false; Set firstpick to

false

pick1 = new
Polycard(card.sx+cardwidth*.5,card.sy+cardheight*.5,cardrad,car
d.info);

Create polygon with
its coordinates at the
center

pick1.draw(); Draw polygon

}

Close if first pick

else { Else…

secondcard = i; …Set secondcard to

reference the card in
the deck

pick2 = new
Polycard(card.sx+cardwidth*.5,card.sy+cardheight*.5,cardrad,car
d.info);

Create polygon with
its coordinates at the
center

pick2.draw();

Draw polygon

if (deck[i].info==deck[firstcard].info) {

Check for a match

matched = true;

Set matched to true

var nm =
1+Number(document.f.count.value);

Increment the number
of matches

document.f.count.value = String(nm);

Display the new count

if (nm>= .5*deck.length) { Check if the game is

over

var now = new Date(); Get new Date info

var nt = Number(now.getTime()); Extract and convert

the time

var seconds = Math.floor(.5+(nt-
starttime)/1000);

Compute the seconds
elapsed