The pink one is for the flower, we need a square. The green one is fit the stem

We start with the flower. We'll mark an asterisk on the square

The asterisk we formed will help is to make another square, do as shown.

I switched for a bigger square. You'll fold two corners to the center

The ones you folded you'll put them into the square, do as in the video

Now more folding. Make it for all the sides of the square

Now let's give shape of flower

Now with a pencil lets roll the paper

The stem

Maybe you can do it better, but that's the idea for the stem

To finish the flower cut a little bit of the bottom and insert the stem

And done!