precision mediump float;

#endif

​

uniform vec2 u_resolution;

uniform float u_time;

uniform vec2 u_mouse;

​

float noise1D(float value){

  return cos(value + cos(value * 90.0) * 100.0) * 0.5 + 0.5;

}

​

void main() {

  vec2 coord = gl_FragCoord.xy / u_resolution;

  vec3 color = vec3(0.0);

  color.r = noise1D(u_time);

  gl_FragColor = vec4(color, 1.0);

}