Fix: Fixed ``BarnDoorSimulator.create_expression()`` method to correctly create the expression.
Fix: Fixed ``BarnDoorSimulator.create_expression()`` method to correctly create the expression.

eoyilmaz/anima,eoyilmaz/anima,sergeneren/anima,sergeneren/anima,eoyilmaz/anima,eoyilmaz/anima,eoyilmaz/anima,sergeneren/anima