Visualizing Continuous Fourier Transform on Simulink

I want to visualize the continuous Fourier transform on the simulink, i can't find a scope that can plot it, all the scopes works only for the discrete Fourier transform, is there is any scope that can plot the continuous FT or any block that can be added before the normal scope to plot FT. The input for the fft block is a rectangular pulse. Can anyone help?