Update README.md

README.md

@@ -4,6 +4,22 @@ tags:
 - zenodo
 ---
 
+<div class="alert alert-danger d-flex align-items-center" role="alert">
+  <svg class="bi flex-shrink-0 me-2" width="24" height="24" role="img" aria-label="Danger:"><use xlink:href="#exclamation-triangle-fill"/></svg>
+  <div>
+    An example danger alert with an icon
+  </div>
+</div>
+
+<div class="alert alert-block alert-warning"> ⚠ In general, just avoid the red boxes. </div>
+<div class="alert alert-block alert-danger"> In general, just avoid the red boxes. </div>
+<div class="alert alert-danger" role="alert"> In general, just avoid the red boxes. </div>
+<div class="alert" role="alert"> In general, just avoid the red boxes. </div>
+
+<div class="course-tip-orange">
+<strong>Error:</strong>
+</div>
+
 <div class="alert alert-danger" role="alert">
     <div class="row vertical-align">
         <div class="col-xs-1 text-center">