help I can't get the door with the red markings to open...

I did the sword swing on both sides of the door and the wall changed to red markings then nothing... I hit the door itself with the sword but again nothing, please get me the hell out of here!!

Look for the other bright red lines, you have to power attack along the same lines to open the door.

When you power attack with the bloodskaal blade some "Sword beams" are let off shoot them into the glowing red lines.

Vertical lines - nonmoving/backwards/forwards pwerattack
Horizontal lines - sideways powerattack

i hit the sides of the door and the red lines moved high up on the wall so I am confused, sorry explain more to me please...

Your sword beams will make the doorframe move and there will be new glowing lines, attack them with sword beams (You will have to aim high)

Thank YOU everyone I did it!!! Yeah......... my friends...........

Welcome!

Congraztztztzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz

That was a pain. I actually got so frustrated I checked YouTube...where I found out how to open the door.