The supplies

Divide your blue clay into 2 equal halves

Put one half of the blue clay in the measuring spoon

Then press it .Some excess clay will come out

Use the needle to take the clay piece out of the spoon

After taking it out it should look like this.Do the same with the other piece

Use the needle to texture the lower part of the semicircle .Just move the needle up and down and round hard to create the texture

Texture both of them .They should look like this

Now flatten both the pieces (a bit )

Take the purple clay and role it into a ball

Flatten it completely

It should look like this

Assemble the purple piece on the first blue piece and that on the other blue piece ,like so