How to create a biphasic rectangular pulse train?

How does one create a biphasic rectangular pulse train where the width and amplitude can be edited. I get how to create a single rectangular pulse but I still can't understand how to create one which is biphasic. The variables for the electrical pulse train are: frequency = 5000Hz , width of pulse = 33µs, amplitude = 760µ Amperes , modulation depth = 0.1.
It should look something like this and the variables can be edited.

 采纳的回答

probably something like that:
fs=100000; %sampling freq in Hz
pulsesPerS=5000;
signalDuration=3; % in seconds
amplitude=760*10^-6;
pulseWidth=33*10^-6;
onePeriod=amplitude*[ones(round(pulseWidth*fs),1); -ones(round(pulseWidth*fs),1); zeros(round(1/pulsesPerS*fs)-2*round(pulseWidth*fs),1)];
wholeSignal=repmat(onePeriod,[pulsesPerS*signalDuration 1]);

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thank you for your response, and when plotting should I just do plot(fs,wholeSignal)? or is there a specific way to plot this response?
the t vector would be
t=0:1/fs:duration-1/fs;
a vector over the duration of time and sampled every 1/fs

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