This is a step by step tutorial showing how make origami lilies with a piece of paper. The steps are quite simple.
Glimpse of the Origami Lilies:
Take a square piece of paper. Preferably colored on one side.
Make horizontal and vertical creases along the center of the paper as shown using the dotted lines.
Flip the paper and fold diagonally. Make a crease and unfold.
Using the diagonal creases at the bottom, fold the paper as shown.
Flatten the top triangle.
Make a fold bringing the right side of the triangle towards the center.
Make a crease and unfold.
Along the crease made, make a triangle at the front.
Repeat the step for each side (4 sides of the model).
Bring the right pointed corner towards the center crease.
Repeat step 11 for the other side.
Make a firm crease and unfold.
Repeat steps 11 to 13 for the remaining 3 sides of the model.
Lift the bottom triangle flap towards the top of the upper triangle. Using the crease, flatten the paper.
Repeat the above step for all the other sides.
Bring down the upper triangle (only for the top layer) and flatten.
Repeat the above step for the other 3 sides. Your model would now look like this.
Turn the model such that the open part is at the top.
Fold the top layer bringing the right edge of this rhombus towards the center crease. Repeat for the left side.
Like before, repeat this step for the other sides.
Gently bring down the top part of each side to open up the petals.
You can attach a stem made of straw or a string to arrange a set of lilies in a vase.