Hi Nur! Please see my latest comment on the general competition page regarding the possible use of rock art icons and colours etc. Thanks again for the great work and for being part of my contest. Much appreciated. Si
Perhaps you might consider using a rock art icons from some of the rock art contained in the Rock Art in the area which can be found at http://www.burrup.org.au/
If you could match the colours to be more like the earthy red of the rocks (from the rock art area) that would be great. This is the perfect image to represent colours for the logo icon: