Visible Timer (Command Blocks) [Configurable!]

Hello there, jackster301 here!

Today I have made a redstone and command block device that displays a timer on the sidebar using command blocks! This clock can be used in minigames or in adventure maps for timed sessions. The time is visible on your sidebar and it runs off redstone and command blocks. Not good to use if you want Something else for the scoreboard. If you want people to keep their levels then you could change the command blocks to use a scoreboard system instead.

The Machine Is Very Customizable!
I have annotated each command block so you know what each block does.

Some Features That Can Be Changed Are:
# Location at which the block teleports you when timer ends.
# End commands can be added.
# Timer time limit.
# Speed at which the timer goes.
# Can add command blocks at the end of timer to do something.
# Beginning TP Co-ords.
# Beginning commands can be added.
# Where the time is displayed.
# POSSIBILITY OF CHANGES ARE ENDLESS!

The map is only 90% Complete because I hope to add some more features such as:
# Timer Beeps Last 10 Seconds (This Time Can Be Changed)
# One Use Per Round (So People Dont Spam Button)

This machine should work for multiplayer, but it is not tested so it may have some bugs.

Additional Notes

Images may be a bit outdated. (Not by much)