How would I make a plugin like Building Tools by F3X

Help and Feedback Scripting Support
#1

[Question]

Hello! So I have a question. My question is how would I make a plugin like Building Tools. I have been trying some things but it never ended up working. Can someone please help me with this if you can? And even tell me what category to change this to please. Thanks!
#2

I wouldn’t suggest even trying if you aren’t an expert at OOP or in general just roblox scripting. This could potentially take you up to a year to create. Though if you wanted a simplified version it could be manageable.