In this video, we learn how to do close to open transition in tango via back bolero. First, go to the level on the roof and run across it. Then, sprint and jump to the balcony across the way. Then land on the new room and find the secret room and fall through it. Run through the building you fall onto, then sprint and jump diagonally pressing 'y' and 'x' rapidly. Find the second secret room on here and fall through this. Once you find the secret room, run through this, then sprint across to another building and find the secret room in here. After this, jump across and you will have found the final room!