precision mediump float;

#endif

​

uniform vec2 u_resolution;

uniform float u_time;

uniform vec2 u_mouse;

​

​

void main() {

  vec2 coord = gl_FragCoord.xy;

  vec3 color = vec3(0.0);

  color.r = u_mouse.x / u_resolution.x;

  color.b = u_mouse.y / u_resolution.y;

  gl_FragColor = vec4(color, 1.0);

}