Create a wavy pattern with pixelmator

Question

How can I create a wavy pattern in pixelmator? Something like this -

Answer 1

You can create a line and add multiple anchor points:

Then select one point yes - one point no etc. After that press arrow up or down and you will get this type of wave:

Answer 2

I give you one way to create waves:

Let's say you have a graphic primitive shape, i.e. line -

You select this form and open Effects Window where you choose Twirl effect and drag it to the shape:

You adjust the values in the popup window -

Click OK when you've done. I duplicated the results just to show the waves I got -

If you want, you can apply this effect to pictures -