Show not tell

This week I went to a workshop about show not tell.
show not tell is when you are creating a picture in your readers mind.

For example if i said i saw a lake it does not describe what it looks like it just tells you but what if i said this.

Over the freezing wood of my balcony i looked over to what looked like a huge puddle filled with shimmering water.
Huge trunks with leaves rustling in the wind surrounded the huge puddle.
Fish swam around looking for food and ducks quacked as they begin to wake up.
A huge light began to rise behind the huge puddle making the water sparkle like diamonds.
The sky began to light up it was as if the darkness was fighting the light.
but you could tell the had won when the darkness began to fade.

Pictures appeared in you head you imagine what i was describing.
Well that's it for today hope this helped you learn what show not tell is.