Second shot at this - following the instructions more closely, still took a considerable time as I kept moving things ( and changing my mind about what stone to use).
There are again several shapes implied in the image, several different triangles and and a rhomboid. The main direction of the image flows from top left to bottom right, and the eye then travels to mid left (the yellow stone), before resting in the centre.
- Remember to read instructions!
- Spend plenty of time trying out various placements before deciding on the final one
- Sometimes less is more (I like the picture with 5 stones best- possibly because it is simpler).