:: StoryTitle
Lock and Key: Variable in SugarCube

:: Start
<<set $key to false>>

Rooms:
[[Back Room]]
[[Front Room]]

:: Back Room
<<if $key is false>>
    Items:
    <<linkreplace "Pick up the key">><<set $key to true>>You have a key.<</linkreplace>>
<<else>>
    There is nothing here.
<</if>>

Rooms:
[[Front Room]]

:: Front Room
<<if $key is true>>
    [[Exit]]
<<else>>
    Locked Door
<</if>>

Rooms:
[[Back Room]]

:: Exit
You found the key and went through the door!