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Simple Oxygen Tank Display

A modification of my cargo container script to work for oxygen tanks.
So picture this. You have an oxygen tank and a screen. You want the capacity of the tank on the screen. You don't want to write a program for that, but you want a fancy bar instead of numbers.
That's what this script does. Put down your Tank and LCD, and remember the names. Put down your programmable block and add this script, and change the names of the blocks at the top to what you want. Put down a timer block, and set it to run the programmable block and itself once every second. Now make sure you own every block, and start the timer. That's it.