Create basic, straight line meshes for webgl

lines.js

const line = Array(40).fill([0, 0, 0]).map((el, index) => [.01 * (index % 2 ? 1 : -1), .2 * Math.floor(index / 2.0), 0]);
const cells = [];

for (let i = 0; i < 20; i += 2) {
  cells.push(0 + i, 1 + i, 2 + i);
  cells.push(1 + i, 2 + i, 3 + i);
}