Wait for the scaffold to move in front of the door, and jump on to the steel grate.Jump though the portal and pick up the Cube.Place a portal on the ceiling above the Unstationary Scaffold and one on the wall next to you, then wait for the scaffold to move into position to be underneath your portal.Redirect the Energy Pellet into the receptacle by placing portals where the scorch marks hit the wall, and the orange light on the ceiling.Walk though the portal, and land on the first platform with the Super Button.
