svg {
  width: 100%;
  height: 100%;
}

.axis path, .axis line {
  fill: none;
  stroke: #000;
  opacity:0.4;
  shape-rendering: crispEdges;
}

.tick {
  stroke-dasharray:2;
  color:gray;
  opacity:0.4;
}

.brownian {
  stroke : gray;
  fill : none;
}

.points {
  fill : blue;
  stroke : black;
}