/usr/share/dx/samples/scripts/KeyIn is in dxsamples 4.4.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18  |     // Import the data
electrondensity = Import("watermolecule");
    // Partition the data
electrondensity = Partition(electrondensity);
    // Create an isosurface at a value of 0.3
isosurface = Isosurface(electrondensity,0.3);
    // Create a camera
camera = AutoCamera(isosurface);
    // Display
Display(isosurface,camera);
    // Wait for keyin before continuing
KeyIn("press enter when you are ready to continue");
    // continue
isosurface = Isosurface(electrondensity,0.5);
camera = AutoCamera(isosurface);
Display(isosurface,camera);
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