# A simple simulation specification
PureTone < PTone1.par # Stimulus module
Figure  Example 1
The example in figure  generates a pure tone, which is then fourier transformed. Each process line contains the module name, followed by the respective file name from which the module's parameters are to be read. These two elements of the process line are separated by the less-than, "<" character-indicating the direction of parameter"flow". Modules which do not have any parameters need not have the less-than, "<" character or the parameter file name, as shown by the second line in the simulation specification example.