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The Associative Array

I wasn't planning to talk about associative arrays despite the fact that they are the main structure underlying all of JavaScript. Also we've come all this way without needing them. But then I decided to work on the Four Turtles Puzzle where, of course, we need four turtles!

We'll re-use your files so far so replace the index.html body with:

<body onResize='resize();'>
<canvas id='c'></canvas>
<script>setup();</script>
</body>

Delete the two picture files and replace what's in styles.css with:

body {
display:flex;
justify-content: center;
background-color: rosybrown;
}
#c {
margin-top:.5vmin;
border: 1vmin groove gold;
}
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