#version 100
precision mediump float;
uniform float uTime;
uniform vec2 uResolution;
uniform vec4 uFragColor;
void main() {
  vec2 uv = gl_FragCoord.xy / uResolution.xy;
  gl_FragColor = vec4(uv.x, uv.y, sin(uTime * 1.0), 1.0);
  //gl_FragColor = vec4(0.0, 0.0, 1.0, 1.0);
}