hi i am playing your Grimrock mod. but i am stuck at the door çlosing at specific times... can u help me? how to open this door?

░░░░░░░█▐▓▓░████▄▄▄█▀▄▓▓▓▌█ ░░░░░▄█▌▀▄▓▓▄▄▄▄▀▀▀▄▓▓▓▓▓▌█ ░░░▄█▀▀▄▓█▓▓▓▓▓▓▓▓▓▓▓▓▀░▓▌█ ░░█▀▄▓▓▓███▓▓▓███▓▓▓▄░░▄▓▐█▌ ░█▌▓▓▓▀▀▓▓▓▓███▓▓▓▓▓▓▓▄▀▓▓▐█ ▐█▐██▐░▄▓▓▓▓▓▀▄░▀▓▓▓▓▓▓▓▓▓▌█▌ █▌███▓▓▓▓▓▓▓▓▐░░▄▓▓███▓▓▓▄▀▐█ █▐█▓▀░░▀▓▓▓▓▓▓▓▓▓██████▓▓▓▓▐█ ▌▓▄▌▀░▀░▐▀█▄▓▓██████████▓▓▓▌█▌ ▌▓▓▓▄▄▀▀▓▓▓▀▓▓▓▓▓▓▓▓█▓█▓█▓▓▌█▌ █▐▓▓▓▓▓▓▄▄▄▓▓▓▓▓▓█▓█▓█▓█▓▓▓▐█

Aw www....no commented first?