The Fan Spiral procedural texture produces a spiral pattern of gradient shapes (figure 1).
Figure 1: The Fan Spiral node and it's associated parameters
Time - Animates the fan spiral effect.
Spin - Specifies the amount of spin or rotation for the fan gradients.
Arc Count - Determines the number of fan gradients.
Transform Input - Positions, scales, and rotates the surface texture.
Projection Input - Sets how the texture projects onto the surface.