Some arcs

For my circle arc based project; related to Celtic knots etc.

click

on the red dots to move and change the arc.
before you do that, click on the "stop" button, and/or reset button, for clearer results.
Warning: animation effect 6 crashes my browser if I run it too long; not really sure why.

HTLM/JavaScript/Canvas; format for arc: ctx.arc(cx,cy,r, ang1, ang2)
variable 1= 100
variable 2 = 0

>

circles
circles
circles
circles
circles
circles