Two different layouts were created.
The first layout is designed for medium & large screens, while the second one is tailored for devices with a maximum width of 736px.
Check out the vanilla implementation using flexbox (without mobile adaptation)
Here is the version utilizing bootstrap, which can be merged as it also utilizes flexboxes
https://i.sstatic.net/MhSN8.jpg
<div class="d-flex gutters">
<div class="bigger-cell">
<div class="hero">
I'm Hero!
</div>
</div>
<div class="cell">
<div class="hero">
I'm Hero!
</div>
</div>
</div>
<div class="d-flex gutters">
<div class="cell">
<div class="hero">
I'm Hero!
</div>
</div>
<div class="cell">
<div class="hero">
I'm Hero!
</div>
</div>
<div class="cell">
<div class="hero">
I'm Hero!
</div>
</div>
</div>