This shows a visual representation of electric field, try placing a charge on the workspace and you will see arrows but what are these arrows? They look like compass needles but this is an electric field! They are dipoles pivoted about that dot in the middle. As far as I know, and I might be wrong, this isn't a standard way of representing electric field we normally use field lines to show the direction and strength of the field but these aren't field lines, field lines are further apart when the field is weaker, these arrows are evenly spaced. We can see how the field strength changes by looking at the transparency of the arrows, again this isn't a standard way of representing field strength.

It's interesting to think how we would draw field lines using this simulation. What exactly is a field line? It's not the path of a particle although if you increase air resistance, like I did in this video, it's quite a close approximation.

The field line shows the direction of acceleration of a positive test charge placed at that point. In this simulation we can place a test charge at any point in the field but where do the lines come from?