Click the piece that is slanted over to your left.  It has a square on top, and the main body of the shape looks like a number 2.  Do not touch anything else That is completely wrong.  De-select it and click a click that looks like a number 2 with a square on top.  Do not touch anything else
page2-9.png page1-36.png page1-130.png page6-78.png
page4-58.png page1-130.png page6-155.png page2-190.png page6-78.png page6-89.png page7-156.png page1-36.png page2-9.png page6-120.png
page6-89.png
Keep that piece, but start paying attention.  Click a small diamond on top of a thin vertical column.  Do not touch anything else!