clearer plot by looping through color range 4 times)

utils.jl

@@ -605,7 +605,7 @@ end
 
 function plot(rl::Vector{Int}, cdata::contourdata)
     n = length(rl)
-    cols = range(HSV(0,1,1), stop=HSV(-360,1,1), length=n)
+    cols = range(HSV(720,1,1), stop=HSV(-720,1,1), length=n)
     traces = Vector{GenericTrace}()
     layout = Layout(
         yaxis=attr(scaleanchor="x", scaleratio=1)