Lift red button

0000000000000000fffffffffffff0000000000000000000 0000000000000000fffffffffffff0000000000000000000 0000000000000000fffffffffffff0000000000000000000 0000000000000000fffffffffffff0000000000000000000 0000000000000000fffffffffffff0000000000000000000 0000000000000000ffff5005fffff0000000000000000000 0000000000000000fff500005ffff0000000000000000000 0000000000000000fff000000ffff0000000000000000000 0000000000000000fff000000ffff0000000000000000000 0000000000000000fef000000efef0000000000000000000 0000000000000000efee0000efefe0000000000000000000 0000000000000000fef900009efef0000000000000000000 0000000000000000ef90000090efe0000000000000000000 0000000000000000ee000000009ee0000000000000000000 0000000000000000e9000000000ee0000000000000000000 0000000000000000e0000000000ee0000000000000000000 0000000000000000e0000000000ee0000000000000000000 0000000000000000e0000000000ee0000000000000000000 0000000000000000e0000000000ee0000000000000000000 0000000000000000e0000000009ee0000000000000000000 0000000000000000e9000000009ee0000000000000000000 0000000000000000ee900000009ee0000000000000000000 0000000000000000edd0000000dee0000000000000000000 0000000000000000ddd0000000ded0000000000000000000 0000000000000000ddd0000000ddd0000000000000000000 0000000000000000ddd0000000ddd0000000000000000000 0000000000000000ddd0000000ddd0000000000000000000 0000000000000000ddd9000009ddd0000000000000000000 0000000000000000ddd9000009ddd0000000000000000000 0000000000000000dddd00000dddd0000000000000000000 0000000000000000dddd00000dddd0000000000000000000 0000000000000000dd900000009dd0000000000000000000 ................................................ ....................0........................... ...................0000......................... ..................000000........................ ...................000000....................... ..................00000000...................... .................0000000000..................... .................0000000000..................... ................00000000000..................... ................000000000000.................... ................000000000000.................... ................000000000000.................... .................00000.0000..................... .................00000000000.................... ..................0000000000.................... .................00000000000.................... ................00000000000..................... ................000000000000.................... ................0000000000000................... .................000000000000................... .................00000000000.................... .................000000000000................... .................00000000000.................... .................00000000000.................... .................0000000000..................... .................00000000000.................... ..................000000000..................... ...................0000000...................... ....................00.00....................... ................................................ ................................................ ................................................ Behind the sliding door Secret door sliding open. Who is it?