<!DOCTYPE html> <!-- webkit-test-runner [ LayoutFormattingContextEnabled=true LayoutFormattingContextIntegrationEnabled=false ] -->
<style>
div {
    height: 42px;
    width: 42px;
    border: 1px solid green;
    position: absolute;
}
</style>
<div style="top: 10px; left: 10px;"></div>
<div style="top: 10px; left: 56px;"></div>
<div style="top: 56px; left: 10px;"></div>
<div style="top: 56px; left: 56px;"></div>