Black and White Cell noise OSL

noise_grid.osl

shader NoiseGrid(
    point proj = point(u, v, 0) [[string label = "Projection"]],
    float scale=20 [[string label = "Scale", float min=0.001, float max=1000, float sliderexponent=2]],
    float utime=1 [[string label = "Time", float min=0.001, float max=1000, float sliderexponent=2]],
    output color c = 0
)
{
    c = cellnoise(proj * scale, utime);
    
    c = color(c[0], c[0], c[0]);
}