I’m wondering if you actually think anybody would be capable of solving this puzzle without help.
Not sure what you meant when you said you can create the square block and the first diagonal at the same time. Literally, the same time?
Just to be clear, my setup sends the block headed to the upper left button directly. The path to the lower button is one space longer so there is a stacked block to account for the timing. This path hits the button from the right side (also can be changed to hit from above which has the effect of 2 blocks being pushed downward when the piston fires.) Either way what I’m left with after making the square are the two down blocks and one right block on the platform. The left block that I pushed onto the diagonal to put the other 2 blocks is motion is now resting on the right extension of the middle pusher. The pistons of the middle and right pushers are fired. Can’t go off of the platform to rearrange anything without being stuck on the ground level. What is left other than to somehow (still inconceivable to me) push blocks down the lower path and trigger the unused piston?