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docs/examples/styles/border.py

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+from textual.app import App
+from textual.widgets import Static
+
+
+class BorderApp(App):
+    CSS = """
+    Screen > Static {
+        height:5;
+        content-align: center middle;
+        color: white;
+        margin: 1;
+        box-sizing: border-box;
+    }    
+    #static1 {
+        background: red 20%;
+        border: solid red;
+    }
+    #static2 {
+        background: green 20%;
+        border: dashed green;
+    }
+    #static3 {
+        background: blue 20%;
+        border: tall blue;
+    }
+    """
+
+    def compose(self):
+        yield Static("Hello, World!", id="static1")
+        yield Static("Hello, World!", id="static2")
+        yield Static("Hello, World!", id="static3")
+
+
+app = BorderApp()