Graphing Sampled Velocities

I am wanting to generate a plot to see what the plot will look like given the velocities that are produced. I have a code where it generates initial velocities and based on those velocities, I want them graphed to see what type of curve it produced. This is a maxwell boltzmann distribution curve. I just need a script that can help produce a graph everytime I entered the number of velocities that it produces and then it uses those velocities and graphs the probability for the y axis and velocities for the x axis.