Time Calculator And Buggy Timer v0.4.2

There are few known bugs. For example time :7 and :07 are the same, :70 isn't.
If you press more than one time count down in a row, timer will count down faster and it will mess up timer.
If you do that you'll probably have to refresh web page. This is not trustable timer yet.
It may count extra second on the beginning and/or on the end.

Asides all that you're welcome to explore this timer.
You can also view source code and see the comments I made for this timer.
[Update] I could solve this by disabling button Count Down for some time (June 12 2022)
[Update] Disabled button when needed (August 28 2022)

Time array
3.5: :30 :30 :15 :9 :06

PickPattern v0.54

1st color:
2nd color:



Horizontal/Vertical Stripes:
Checkerboard:
Your browser does not support the canvas element.

There's known semantic bug in code.