Yes. For real electromagnetic wave in vacuum, the speed of light is 3*10[sup]8[/sup]m/s.
And the ratio of E/B=v.
There is no way to draw both E and B in the same simulation if the ratio of E/B=c.
And it is also impossible to show the wave proprgate as "REAL speed of light" in the simulation.
This is just a simulation, the purpose is to show the direction of E and the direction of B related to the propogation of the wave. ;)