The same way you generated a pulse (that you could read with an oscilloscope, so it was represented as a time-varying voltage), you can "see the output waveform" if you have hardware capable of sampling the time-varying voltage signal at a sufficiently fast rate.
I just looked at the code you attached, and can't really see/understand the Pulse, and why your scope (which "only goes up to 1 MHz") can't visualize the signal. Most of the functions that you use aren't visible in the attached code (they look like grey boxes with large grey question marks in them), but your Front Panel talks about a Pulse Width of 1 sec with an amplitude of 1 V (not hard for a scope to show), and a 1 kHz sinusoid ("Pulse generator"?), also not a problem for your scope.
Bob Schor