5-19 One at a Time

Start with plain blue square. Vertical pipes:
 * 1) Move it through the yellow portal then blue portal.
 * 2) Move a bridge to you can move it to the far left column.
 * 3) Move another bridge to allow it to move over the yellow button.
 * 4) Pick up the new bridge and move it up one square.
 * 1) Move one of the vertical pipes across bridges toward the red portal on the right.
 * 2) Use the plain square to open the red button, exposing the green portal.
 * 3) Move the vertical pipe onto the red portal on the right. That ports it to the upper left.
 * 4) Move it into the green portal and position the pipe.
 * 5) Rinse and repeat.5-19.png