Simple music visualizer for Live-Coder

visualizer.glsl

uniform vec2 resolution;
uniform float lowFreq, midFreq, highFreq;
uniform float time;

vec3 circle(vec2 root, vec2 position, float radius, vec3 color)
{
   if (distance(position, root) < radius) return color;
   return vec3(0);
}

void main( void ) {
   
   vec2 p = -1.0 + 2.0 *  ( gl_FragCoord.xy / resolution.xy );
   p.x *= resolution.x / resolution.y;

   vec3 color = vec3(0);
   
   color += circle(mod(p,0.5)-.25, vec2(0,0), lowFreq*2.,   vec3(1.,0,0));
   color += circle(mod(p,1.)-0.5, vec2(0,0), midFreq*10.,   vec3(0,1.,0));     
   color += circle(p, vec2(0,0), abs(highFreq*105.*p.x), vec3(0,0,1.));
   gl_FragColor = vec4(color,1.0);
}