In the diagram below you can see four independent patterns. Each pattern is a puzzle by itself, and by solving it you will be able to encounter one or more digits of the final, 6-digit numeric solution. Signs above tell how to get these digits once the mini-puzzle is solved.
Most puzzlers should already be familiarized with the challenge presented by these patterns. However, the solution is this case involves numbers as well as letters.
Backstory: "The 6-digit number you will find is a password that allows you to enter the fifth dimension and therefore become one with the universe. Also, it's the only way to save humanity."
Contrary to what my storytelling skills may indicate, no black sorcery is required in the solution to this puzzle.
Also, please notice that this post contains hidden tag(s), which would otherwise hurt the purpose of the puzzle.
It's natural for you to be clueless during these puzzles. However, numbers may come in handy when words are lacking.