Cut And Paste Code For Lesson 7


 Here is a simple "for" loop that counts to 1000:

<!DOCTYPE html>
<html>
<body>
<script>
var i;
for (i = 0; i < 1000; i++) {
    document.write(i);
    document.write("<br>")
}
</script>
</body>
</html>


Bouncing Circle Design Creator

The following code uses a "for" loop to draw your circle patterns only the number of times you specify.
It also draws your patterns nearly instantly!

<!DOCTYPE html>
<html>
<body>
<canvas id="myCanvas" width="500" height="300" style="border:1px solid #d3d3d3;">
Your browser does not support the HTML5 canvas tag.</canvas>
<script>
var xpos = 250;
var ypos = 0;
var ymove = 1;
var xmove = 1;
var x;
for (repeat = 0; repeat < 90; repeat++) {
var c = document.getElementById("myCanvas");
var ctx = c.getContext("2d");
ctx.strokeStyle = "blue";
ctx.beginPath();
ctx.arc(ypos,xpos,40,0,2*Math.PI);
ctx.stroke();
xpos= xpos+ymove;
ypos = ypos+xmove;
    if (xpos > 256) {
          ymove = -12
    }
    if (xpos < 43) {
          ymove = 12
    }
    if (ypos > 455) {
         xmove = -12
    }
    if (ypos < 43) {
          xmove = 12
    }
}
</script>
</body>
</html>


Lesson 7 notes:

You can also bounce a square!  Add this code instead of your circle code:

ctx.rect(ypos, xpos, 150, 100);