Well, I was surfing around and look what I've found.
The first picture I liked was the following.... look at the black dot in the middle and swing forward and backward - the circles will move
The second thing, which drew my attention was the following pic.... Look at the cross in the middle - Do you see the gree blinking circle? But it doesn't exist
They are just disappearing in turn...
And these horizontal lines are collateral - believe it or not
And the last one for you
