You start the rounded petal just like a diamond, for this first try with one single base loop. If you want your petal
to be rounder, you start with working more than two loops in the base loop.
You increase up to the desired width of the petal.
You start decreasing the number of loops, but stop when you have several loops left. The exact number of rows worked and
loops left standing decides about the look of the leaf. If you have as many rows as you have loops left it will be a rather
circular appearance, if you have more rows than loops left you will get an elongated petal.
When you are finished with the petals, you enclose the edges. This step is important for completing the rounded-off look.