turtle/test.htm at master · ehardebeck/turtle · GitHub

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<!DOCTYPE html>
<html>
  <head>
    <title>Turtle Graphics - Test Page</title>
    <meta charset="utf-8">
    <script type='text/javascript' src='turtle.js'></script>
  </head>
  <body>
    <h2>Turtles on Canvas</h2>
    <canvas id="screen" width="384" height="256" style="background-color: black; border: 1px solid black">
      Canvas not supported on this browser
    </canvas>
    <script>
      var t = new Turtle("screen");
      function Square()
      {
          t.fd(100);
          t.rt(90);
          t.fd(100);
          t.rt(90);
          t.fd(100);
          t.rt(90);
          t.fd(100);
          t.rt(90);
      }

      function Squares()
      {
          Square(); t.rt(30);
          Square(); t.rt(30);
          Square(); t.rt(30);
          Square(); t.rt(30);
          Square(); t.rt(30);
          Square(); t.rt(30);
          Square(); t.rt(30);
          Square(); t.rt(30);
          Square(); t.rt(30);
          Square(); t.rt(30);
          Square(); t.rt(30);
          Square(); t.rt(30);
      }

      t.SquareSz = function (sz)
      {
          this.fd(sz);
          this.rt(90);
          this.fd(sz);
          this.rt(90);
          this.fd(sz);
          this.rt(90);
          this.fd(sz);
          this.rt(90);
      }

      t.SquareSpiral = function()
      {
         for (var i = 1; i <= 36; i++)
         {
              this.SquareSz(i * 5); this.rt(10);
         }
      }

    </script>
    <div>
      <input type="button" value="Square"         onclick="Square();         return false;"/>&nbsp;&nbsp;
      <input type="button" value="Squares"        onclick="Squares();        return false;"/>&nbsp;&nbsp;
      <input type="button" value="SquareSpiral"   onclick="t.SquareSpiral(); return false;"/>
      <input type="button" value="Clear"          onclick="t.clear();        return false;"/>
    </div
  </body>
</html>