CharStiles

// http://www.iquilezles.org/www/articles/palettes/palettes.htm 
// to see this function graphed out go to: https://www.desmos.com/calculator/18rq4ybrru
vec3 cosPalette( float t , vec3 brightness, vec3 contrast, vec3 osc, vec3 phase)
{

    return brightness + contrast*cos( 6.28318*(osc*t+phase) );
}

vec3 hsb2rgb(vec3 c)
{