Hover Slam Landing Script

How to set up this script:
1) Put this script in a programmable block, check code and remember and exit.
2) Place a timer block. In the timer block setup 3 actions as follows: 1. Run the programmable block with this script 2. Trigger-now the timer block itself. 3. Start the timer block itself. Set the timer block to a 1 sec delay
3) Create a group of ground facing HYDROGEN thrusters named THR (name is customizable below/in the script)
4) Place a ******* or a remote control named reference (name is customizable below/in the script). This block must face the sky/space/opposite of your ground facing hydrogen thruster group. (If you want to place your ******* facing where you want add a remote control as well and name it reference)
5) Add to the toolbar the timer block - trigger now
6) Add to the toolbar the programmable block set to run with the argument: start
7) Add to the toolbar the programmable block set to run with the argument: stop
8) Add to the toolbar the programmable block set to run with the argument: fall
9) Modify the MANDATORY settings below/in the script. Otherwise you will most likely crash.
10) Make sure to have ownership of all blocks