Help required in generating switching pattern

I am simulating a project in PSIM for which I need to generate switching signals for IGBTs. I have seen a PWM example in PSIM but my confusion is how to add short patches in PWM where it becomes zero for a certain time and continues after it. I'm attaching a picture of the required PWM pattern (FIG 7). Now If we just look at signal E, it becomes 0 just before the positive cycle ends how I can do it in PSIM also signal AD in on during +ve cycle only and signal BC is on during -ve cycle only how I can generate such kind of PWM in PSIM