How can I simplify this?

def command_dsfgh
  if $var_ex[1] = nil
    print('shit happens')
    $scene = nil
  end
  elsif $var_ex[1] = 1
    $var_val[1] = + 0 #Pointless, eh?
    $scene = scene_window1.new
  end
  elsif $var_ex[1] = 2
    $var_val[1] = + 2
    $scene = scene_window1.new
  end
  elsif $var_ex[1] = 3
    $var_val = + 4
    $scene = scene_window1.new
  end
  elsif $var_ex[1] = 4
    $var_val = + 8
    $scene = scene_window1.new
  end
  elsif $var_ex[1] = 5
    $var_val = + 16
    $scene = scene_window1.new
etc...

Basically it's a=b+(2^c) and scene_window1 uses the value of "a" for something.

I'm not an EXPERT PROGRAMMER who has achieved Satori yet so I wouldn't know what to do in this type of situation. In before lol enjoy your toy language, Ruby on Fails, sage bomb, etc.

>>2
I dunno, lol