closure :: fn(): Any do
    value := "Closure";
    internal :: fn(): String do
        print value;
        return value;
    end;
    return internal;
end;

internal := closure();
internal();

a := "Global";
b := a;
c := b;
c = b = a;
d := c = b = a;
do
    showA :: fn(): Nil do
        print a;
    end;

    showA();
    a := "Local";
    showA();
end