text: 'use strict';
  
  module.exports = function (regl) {
    return regl({
      vert: `
        precision highp float;
        attribute vec2 xy;
        varying vec2 uv;
        void main () {
          uv = xy * 0.5 + 0.5;
          gl_Position = vec4(xy, 0, 1);
        }
      `,
      attributes: {xy: [-4, -4, 0, 4, 4, -4]},
      depth: {enable: false},
      count: 3
    });
  };
  