I'm at the bottom? Of the final area with the 4 puzzles that you complete, then seem to have to draw a puzzle with a blue line that fits them in?!?!

Been on this one for days now and have gone back and completed all areas. I just want to get to the endgame. Any help would be appreciated!!

Try playing around with the 4 puzzles.

Take a look at the four puzzles in the floor, they may have more than one solution that will impact how you solve the final puzzle in the room.

I had the same issue and as @thelastgunslinger says one of the puzzles might require you to put in a different solution

Here is a clue. Get some graph paper. Map out the possible solutions given the symmetry. See what clicks in your brain.

Also, I would suggest dividing the solutions into two sets: those with even and those with odd number of blocks. This will tell you whether the inner spine, comprised of 5 blocks, is inside or outside the outline. Additional hint you might or might not welcome: only one sub-puzzle allows control over this number.