Once inside a Roblox game (any game will work, but building games like Theme Park Tycoon 2 are best), open the executor’s text box, paste the script, and hit "Execute".
(often known as Building Tools by F3X) is the gold standard suite of building instruments on Roblox. It allows players to manipulate 3D objects with high precision—moving, rotating, scaling, and coloring parts much faster than the default Roblox studio tools. f3x gui universal mobile script exclusive