With this script you can perform a heist on the Humane Labs.
You can chose where you would like to start the heist and how you would like to enter.
Go to the main entrance and press E or right d-pad to start the heist. Enter through the main entrance, fight through the guards, swipe the keycard to access the lab, steal the chemical weapons, leave back through the front entrance and lose your 4 star wanted level for a reward.
Alternatively, you can go to the rear entrance and press E or right d-pad to start the heist. Enter through the underwater tunnel, take the lift to the top floor, steal the chemical weapons and fight your way out the lab through the main entrance.