Gradient’s parameters:

The previous applied instrument will be helpful in drawing a smaller circle situated inside of the first one.

Choose the same instrument and try to represent a kind of varnish surface of black color on the disk’s surface. First we have to process the outside edges and then press Alt button to cut out an orifice on the disk.

Start representing the logotype, using this tool . Click on this option on the layers and the unnecessary elements must be erased with the appropriate instrument.