In between the second and third gate, there’s a surface only for time portals that are opened by pressing a button. Now that the first gate is open, head there and create a new portal so the laser goes through the present cube once again, thus opening the second gate. It’s important that it’s done out of order like this, because the moment the present cube is rearranged, the future one will vanish. Create a new portal in the area underneath the laser gates and use the future cube to redirect the laser into the reticle with the number one dice block. This will disable the second laser gate, but what about the first? Another laser cube is needed, so head to the future and grab the future version of the same cube and bring it back to the present. Then, use the cube to redirect the laser into the reticle next to the symbol with the two dice. Fire a new portal into the portal surface near the ceiling where the laser is firing and then another one on the surface right of the stairs. This special cube can redirect thermal discouragement beams or the red lasers. To begin, press the button on the left side of the room to drop a cube into the excursion funnel and then fire one portal where the funnel ends and another on the ground so the player can grab the cube.
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