Constraints:

• The door must be approximately 10 by 12 inches (rectangular) and be able to lift a minimum of 12 inches.
• The door must be made out of materials which would be appropriate for use in an outdoor chicken coop.
• The door must have a clear open and closed position.
• The door must have an automatic and manual method of opening/closing.
• The door should not be able to be opened easily when in the closed state.
• The door must be safe.
• The door must be constructed with a $40 budget.