Attempting to plot multiple contour levels

I’m working with a legacy program that allowed the user to specifically define the contour level. I know that in plotly you can set a range and step with start, end, and size but I’m looking to keep this option intact.

I’ve seen on these forums that there is no direct way to do it. I.e. and input array of contour levels, but I was hoping for something along the lines of an ability to overlay multiple contours on top of one another to create one image. As If I were to make a plot with 5 user defined contour levels each of which is plotted individually one level at a time eventually filling up the whole graph.

Or is there any other indirect way to achieve this?