      .attr("stroke", "white")
 
   # axis: labels
-  axis.append("g").selectAll("text.axis")
-     .data([-1, -0.75, -0.5, -0.25, 0, 0.25, 0.5, 0.75, 1])
+  Laxis.append("g").selectAll("empty")
+     .data(LaxisData)
      .enter()
      .append("text")
      .attr("class", "axis")

     .attr("y", (d) -> yScale(d))
     .attr("dominant-baseline", "middle")
     .attr("text-anchor", "end")


  # curves for quantiles

     .attr("fill", d3.rgb(200, 200, 200))

  # axis on left
  LaxisData = [-1, -0.75, -0.5, -0.25, 0, 0.25, 0.5, 0.75, 1]
  Laxis = svg.append("g")

  # axis: white lines
  Laxis.append("g").selectAll("empty")
     .data(LaxisData)
     .enter()
     .append("line")
     .attr("class", "line")
