Maptool / Open darashia DL door

[Nighthaze]

Hello im trying to do a script in Darashia DL and refill but the problem is when im coming to the Door to entre the spawn it's a level requier door. And i have looking around the forum and everybody talking about MapTool , what is maptool i cant find it in bbot. Can somebody send me a TUTORIAL on the maptool to open doors.

THANKS