so before you star this is what in should look like here's how to do it so before you cross the start line you want to put a portal at the back to do so you stand to left of left pole by about 2-3 seconds once you have the portal down start b-hop to the start and jump off the edge and shoot a portal under you and you end up on floor 2 (or t2 that's just what I call it) then jump off the edge and shoot a portlet under you again (this might take a few try's) then shoot a portal on the ramp as high up as possible (not needed only to be safe and then jump off again and that's it if you did it properly you should be done.