This tutorial, I will tell you the basics to pentro making. The scripting will be in the next tutorial (Will come in UP to a week. Sorry for making you wait!) For @Formula-- EDIT - I am making a Pentro Kit on my main @X37X2Z, so follow on there to not miss the pentro kit!
http://scratchblocks.github.io/#?style=scratch3&script= is where I got the vector blocks. @mathmathmath for the 2d graphics tutorial here: https://scratch.mit.edu/projects/167377719/ (The tutorial is multi-part. I recommend you go through the ENTIRE tutorial. It will DEFINITELY help you.) ME for the bad explanation XD
