NoiseXYZ

NoiseXYZ takes x (a float), y (a float) and z (a float), and answers a float.

NoiseXYZ(x float, y float, z float) → float

DO  Print(NoiseXYZ(100.0, 120.0, 100.0))  Sync()LOOP

NoiseXYZ is called and its answer is printed every frame. The DO … LOOP is not decoration: a classic BASIC program ends the moment it runs out of lines, and Sync() is what draws the frame.