// Import the water molecule data
data = Import("watermolecule");

// Create an isosurface at the value 0.3
isosurface = Isosurface(data, 0.3);

// Compute the gradient of the electron density
gradient = Gradient(data);

// Map the gradient onto the isosurface
isosurface = Map(isosurface, gradient);

// Color the isosurface based on the magnitude of the gradient. 
colored, colormap = AutoColor(isosurface);

// use the colormap output of AutoColor as input to the ColorBar module.
// The bar will be placed on the right hand side of the image, half way up.
colorbar = ColorBar(colormap, position = [0.9 0.5]);

// Collect the colorbar with the colored isosurface
collected = Collect(colorbar, colored);

// Display the bar with the isosurface
camera = AutoCamera(collected, "off-diagonal");
Display(collected,camera);