How to build upwards/downwards rotating doors  

• Build three sectors in a row, make sure the middle sector is slight bigger.
• In the middle sector build a long thin sector, make it valid player space.
• Tag this sector 0,30. Raise the sector 2 clicks from the floor.
• Insert an sector effector (SE) on top of the sector's tag
• Tag this SE 946,0 and point it to the right
• Insert another SE at the bottom of the sector, tag it 946,1 point it to the left.
• Insert an activator (A) on the central SE (the one on the sector tag)
• tag the A 0,947 and point it to the left
• Insert switches anywhere, tag these  261,947
• Position the sprites as shown below:
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• The door is now complete.
• Download the map pictured above.
• TUTOR1.ZIP