Positioning in css?

How to make so that the unit container is above the small block and not Vice versa. At the same time that he would remain in relation to it parent
https://jsfiddle.net/3oaxdj8v/
Set the z - index priority
June 10th 19 at 14:55
1 answer
June 10th 19 at 14:57
Solution
z-index: -1; for #small
and remove the z-index for #container
wrong answer - Lenny.Botsfo commented on June 10th 19 at 15:00
, Forgot to add) - Florence_Medhurst commented on June 10th 19 at 15:03
Thank you very much for the answer. And it is possible still a small question, why? Why have I not worked? - Harrison_McLaughl commented on June 10th 19 at 15:06

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