CodePen Embed - css image responsive

<div class="container">
  <img src="https://1.bp.blogspot.com/-oqyfd-OXI1E/Xyu8A3yAX2I/AAAAAAAABIk/nWcBTwLWVMoXn26KiIzZI4omKEsPTTEvQCLcBGAsYHQ/s320/Baby-Steps.png" width="960" height="640" />
  <img src="https://1.bp.blogspot.com/-oqyfd-OXI1E/Xyu8A3yAX2I/AAAAAAAABIk/nWcBTwLWVMoXn26KiIzZI4omKEsPTTEvQCLcBGAsYHQ/s320/Baby-Steps.png" width="960" height="640" />
</div>


<style>
.container {
  width: 100%;
}
img {
  width: 100%;
}
</style>

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