precision mediump float;

uniform sampler2D uTexture;
uniform vec3 uTime;
uniform vec2 uMouse;

varying vec2 vUv0;
varying vec2 vUv1;
varying vec2 vUv2;

vec2 offset(vec2 uv, float time) {
    return uv + vec2(
        (-uMouse.x*0.2 + time) * pow(
            ((1.0 - uv.y) + 1.0) * .5,
            8.0
        ) * 0.1,
        0.0
    );
}

void main() {
    float a = texture2D(uTexture, offset(vUv0, uTime.x)).x +
              texture2D(uTexture, offset(vUv1, uTime.y)).y +
              texture2D(uTexture, offset(vUv2, uTime.z)).z;
    
    gl_FragColor = vec4(
        236.0 / 255.0,
        247.0 / 255.0,
        241.0 / 255.0,
        a
    );
}