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diff --git a/csci4131/lec/Lex8Ex1.html b/csci4131/lec/Lex8Ex1.html
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+<!DOCTYPE html>
+<html>
+<body>
+
+<h1>Display a Telephone Input Field</h1>
+
+<form action="https://www.cs.umn.edu/">
+  <label for="phone">Enter a phone number:</label><br><br>
+  <input type="text" pattern="^[2-9]\d{2}-\d{3}-\d{4}$"/>
+  <small>Format: 123-456-6789</small><br><br>
+  <input type="submit">
+</form>
+
+</body>
+</html>
+\ No newline at end of file