text: import plotly.graph_objects as go
  
  fig = go.Figure(data=
  go.Contour(
      z=[[10, 10.625, 12.5, 15.625, 20],
         [5.625, 6.25, 8.125, 11.25, 15.625],
         [2.5, 3.125, 5., 8.125, 12.5],
         [0.625, 1.25, 3.125, 6.25, 10.625],
         [0, 0.625, 2.5, 5.625, 10]],
      # heatmap gradient coloring is applied between each contour level
      contours_coloring='heatmap'  # can also be 'lines', or 'none'
  )
  )
  
  fig.show()
  