Prompt: Generate a solid colour image: radial variation from the centre of the circle, with a continuous transition from colour #AFAFAF to colour #191919.
Prompt: schematic illustrates transition zone of functionally graded material, the transition zone is varying continuously from one material to another , one object， clear and concise without words
Prompt: schematic illustrates transition zone of functionally graded material, the transition zone is varying continuously from one material to another ,clear and concise without words
Prompt: schematic illustrates transition zone of functionally graded material, which is varying from a metal material to another ceramics material
