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<!DOCTYPE html>
<html>
<style>
.grid {
display: grid;
gap: 10px;
padding: 10px;
grid-template-columns: repeat(4, 60px);
grid-auto-flow: dense;
}
.upwards {
transform: translateY(-80px);
}
</style>
<body>
<p>Ensure that dense-packing correctly accounts for the gaps between items when placing them in track openings. Items to be placed in track openings are yellow.</p>
<div class="grid">
<div style="background: aquamarine; height: 120px;" >
1
</div>
<div style="background: blue; height: 40px;" >
2
</div>
<div style="background: blueviolet; height: 20px;">
3
</div>
<div style="background: lightsteelblue; height: 60px; grid-column: 4;">
4
</div>
<div class="upwards" style="background: yellow; height: 10px; grid-column: 2 / span 2;">
10
</div>
<div class="upwards" style="background: yellow; height: 10px; grid-column: 2 / span 3;">
6
</div>
<div class="upwards" style="background: yellow; height: 10px; grid-column: 2 / span 3;">
7
</div>
<div class="upwards" style="background: yellow; height: 10px; grid-column: 2 / span 3;">
8
</div>
<div class="upwards" style="background: aqua; height: 20px; grid-column: span 4;">
5
</div>
<div class="upwards" style="background: green; height: 10px; grid-column: span 3;">
9
</div>
</div>
</body>
</html>