<!DOCTYPE html>
<html lang="en">
  <head>
    <style>
      .wrapper {
        display: grid;
        grid-template-columns: 75px 75px 75px;
      }

      .box1 {
        grid-column-end: 1;
      }

      .box2 {
        grid-column-end: 1;
      }

      .box3 {
        height: 100px;
        grid-row-end: 1;
      }

      .box4 {
        grid-row-end: 1;
      }

      .box5 {
        grid-column-start: -1;
      }

      .box6 {
        grid-column-start: 1;
        grid-column-end: 1;
      }

      