1. Add the script to a programmable block. No Timer block needed.
   
2. Add FFI to the name of a cockpit/flight seat/remote control of your choice. This will be the reference for what is downwards facing thrusters. Also, what is zero in height above ground. (You should adjust this in the settings).

What to display is defined in the Custom Data of the LCD Panel. Start by writing FFI at the top, then add elements below. You can use the same configuration on many panels by using the copy keyword.
If you don’t want to configure everything, you can use one of the preloaded setups.
Once you have edited the Custom Data of an LCD, you can send the update argument to the script and it’ll update according to your changes.

Sending the update argument
The easiest way is to write update in the argument field of the programmable block. Then pressing Run.
You can also add the programable block to a button or your hotbar and write update in the argument field.

A preload is a panel configuration that ships with FFI. When you request one, it will insert itself into that Panel.
Enter the Custom Data of an LCD Panel. Write FFI followed by one of the preload names:

• Mass
  
• Speed
  
• Fuel
  
• Tug-altitude
  
• Tug-speed
  
• Tug-lift
  
• Landing-gears

Example: FFI Speed
Then send the update argument to the script.

Here comes the cool part!
You define a panel in the Custom Data of the LCD. And when you’ve made a change, send the update argument to the script.
Each panel starts with FFI, followed by elements and their data. Here’s a basic example:

That writes the word Speed on the screen in gray and the speed your ship is going in white.
Oh, and don’t forget to send the update argument to the script.

There’s ten (or eleven depending on how you count) elements you can use. Some of them defines properties of the LCD, and some of them are things that show up on the screen.
Now this can be a bit overwhelming at first, but I promise it’s actually not that bad.
Required properties must be in order. Optional properties can be in any order you like.
Values separated by a / means that you can use either of them.

You don’t need to specify the default values, naturally.
Size, and Background can only be defined once per panel. The rest can be used freely.
Font can be set using the Font element (not listed above), but I advice you to use the font drop-down in the terminal instead.

The named colors are quite limited for now. Use RGB if you want more control.

• Yellow
  
• Red
  
• Blue
  
• Green
  
• White
  
• Gray
  
• Black

These are the values you can display. Remember that you can show them in percent as well by adding the % property. Note though that you might need to add min and max values for some of them to make sense.

Reset id
All FFI instances has a random ID between 0 and 9999. There is a chance that two instances get the same ID. This is no desirable, but there is a solution. If you send the reset argument, FFI will remove its ID from all blocks it’s connected to, then forget it. On the next update it will start from scratch and generate a new.

Changing the ID
If you’re not contempt with letting FFI generate a new ID, you can enter one manually. Simply send the desired ID as the argument. FFI will take it, and update all connected blocks as well.
The ID has to be in this format FFI-#### where # is a number between 0 and 9999.
Valid ID examples:
FFI-1 | FFI-42 | FFI-666 | FFI-1337

This section is work in progress. I will add to it as I find time.

Centered text
This writes "Hello!" centered on a regular LCD, 5 pixels from the top. The X value 29 pixels is about half of the width of a regular LCD and the property center tells it to center the text on the X coordinate. The Y coordinate will always be at the top of the text.

Convert a value to percent
This will show the battery change in percent instead of it's default unit watt hours, 5 pixels from the top and left. This is achieved by having a percent sign as a property (not as a suffix to a value).

Automatic backup reactors
This line toggles the group *BackupReactors* on and off once the battery charge in percent falls below 5% or rises above 25%. Make sure the reactors are in the right state for the current battery charge when setting it up. It doesn't know on it's own if to turn on or off, it just changes the current state. To make it fool proof, use these two lines instead:
Line one turns the group *BackupReactors* on once the battery charge falls below 5%.
Line two turns the group *BackupReactors* off once the battery charge rises above 25%.

Extending landing gears
This reverses the direction of the pistons in the group *Landing pistons* when the distance between anything and a camera placed on the bottom of the ship is less than 7m. Put FFI in the name of the camera you wish to use, and send the update command to FFI.
If you have more than one camera connected to the script, it will use the one closest to an object.