Really annoying glitch...

Question

I was experimenting with shapes so I created this html code to begin with then build from:
<style>
#square {
width: 50px;
height: 50px;
background: black;
position: relative;
}
</style>
<div id="square">
</div>
It worked so far, creating a small, black square.
Then I wondered if it would work without a backround code, so I took thar bit out. It didn’t work, so I typed it back in exactly as it was, and it didn’t work!
Has this happened to anyone else and is there a solution to get it to work again?

Answer 1

George I tested this for you a few times its working fine for me did you accidentally remove a ; or misspell something? I pasted this exact post and it worked great.

Answer 2

oh - I wrote backround instead of background...
I feel a bit silly now - thanks for your answer anyway!