Script with In-game Variables

[germen]

I have a Variable named [001: Mining Exp]
and another that says [002: Mining Lvl]

I have created exp lvl thing (on pen and paper) and would like that whenever a certain amount of Exp. goes up the Lvl goes up also. If thats not the scripting part then this is, How can i put the [002: Mining Lvl] and build that info into what already is the 'Main Menu' for exm: Mining Level: \v[2], where it updates that info?

I hate to ask all these questions that might seem simple to you guys. Im currently studing my scripting for dummies, Attribute tutorials, Variables UNmystified, and slowly but surely progressing. I appreciate all the help i can get, im a one man person slowly learning how to make a game

 

[Daniel]

Use this to access the game variable in a script:

$game_variables[id]

 

[germen]

Like this?

class Scene_MiningLevel < Window_Base
  
  def initialize
    case $game_variable[2]
    when 0..50
      @mining.lvl += 1
      refresh
    when 50..134
      @mining.lvl += 1
      refresh
    when 135..999999999
      @mining.lvl += 1
    refresh 
    end
    $game_variables[1] = @mining.exp
    $game_variables[2] = @mining.lvl
    @mining.exp = 1
    @mining.lvl = 1
  end
end

sorta like that? Not to clear of how to start, or really go about it