Now there are 6 of us!
Opacity in a Div is a new idea to me and I like it. It adds a new dimension, so to speak, to the repertoire.
I am on the bottom of the stack with what I thought would be the Numero Uno spot! Boy, was I wrong! Being Number 1 is not at all what it used to be. Seems that in this arrangement, being third is best. But, we won't let him know that some other layers are planning on moving in above him and from what I hear they will not allow themselves to be transparent. They will have z indexes of 4, 5 and 6 (well, anything that is more than 3)!
Wow! Cannot wait to see that!
It happened!

Put me beneath the third layer in the stack so that I can demonstrate its opacity. It is good that I will not be hidden!