Using the output from OptSeq, is there a possible ( easy ^u^ ) way of plotting in the same graph the presentation of stimuli with their convolution?

So basically, I created my design using OptSeq. To make it nicer, I want to plot this. I am not aware of freesufer and I use SPM. In SPM it just shows the convolved stimuli without showing sticks of the stimuli.

I have attached a picture taken from the genetic program that helps creating or optimizing fMRI designs just to show you what I mean or I want.