Pick up the cube and wait for the Unstationary Scaffold to get near you.
Shoot the other portal on the floor below and drop down through the portal.
When the panels are in the correct angle, put a portal on the panels and then turn left and go to the ledge.
Push the switch and go through the portal.
Shoot a portal above the glass on the other side and the other one on the wall next to you.
Get on the platform and wait for it to stop at the other end.
Wait for the Pellet to reach the catcher and walk to the Unstationary Scaffold.
Enter through the portal and press the switch.
Quickly fire a portal on the wallpanels facing the switch and the other one on the wall near you.
Shoot a portal on the wall where the emitter is about to fire the next Pellet and wait for the Pellet to go through the portal.
Go stand next to the switch and fire a portal on the extended walls on the other side of the chamber.
You should have deactivated all of the four turrets.
Put a portal there and the other one where the emitter is going to shoot next.
At the back of the chamber there are extended walls facing the last turret.
Do the same again for the turret aiming at the same wall and to the turret near you.
Wait for the Pellet to knock the turret over. Shoot a portal on the wall where the beam ends and the other one where the High Energy Pellet emitter is going to shoot next.
Follow the aiming beam of the turret on the platform near you.
Crouch and get to the second part of the chamber. Shoot the other one on a platform below and jump through it.
Place a portal on the extended wallpanels near the ceiling.
Fire a portal on the same wall and put the other one near yourself and go through. Shoot a portal on the ceiling above it and the other one under yourself. Put the other portal on the wall above the goo and jump through it.
Turn right and place a portal on the ceiling.
You should automatically drop through for the second time and then land on the other side of the Goo.
Go back in the hall and the shoot a portal on the floor at the end of the hallway.
Turn around and fire a portal on the third panel above the hallway.
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