CSS Grid: use grid columns

HTML-CSS
1

Tell us what’s happening:
why my code doesn’t work if it’s= grid-column 1/3

Your code so far


<style>
.item1{background:LightSkyBlue;}
.item2{background:LightSalmon;}
.item3{background:PaleTurquoise;}
.item4{background:LightPink;}

.item5 {
  background: PaleGreen;
  /* Only change code below this line */
grid-column: 3 / 1;

  /* Only change code above this line */
}

.container {
  font-size: 40px;
  min-height: 300px;
  width: 100%;
  background: LightGray;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  grid-template-rows: 1fr 1fr 1fr;
  grid-gap: 10px;
}
</style>

<div class="container">
<div class="item1">1</div>
<div class="item2">2</div>
<div class="item3">3</div>
<div class="item4">4</div>
<div class="item5">5</div>
</div>

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.97 Safari/537.36.

Challenge: Use grid-column to Control Spacing

Link to the challenge:

2

Hello @armane15 ,
it says " the last two columns" , not the first two!
Cheers

3

the code is from the example

4

1/3 wont work, look again how the lines are numbered on the example in the test description