sorry for my bad english,but i was tired and angry.so.i cant make doors what wants a key.Blue,red,or yellow,none.i took down a key,i create a door for it,with in the effects option,door(a colour) open wait close.it didn't work.and the bridge problem.please try to imagine a map,like an R.but it is strange,the part of this R,is like a D just,reversed. it is the large area of this large sector.what remain from R,i divide 4 parts.First i use a switch for the first part of the bridge,after i get a new switch,i use the new one ,but the second part of the bridge doesn't want to raise up,just appears.And i used i think action 20 - raise the floor to next higher floor.Now?