index.html

<!DOCTYPE html>
<html>
  <head>
    <title>Grid</title>
    <link rel="stylesheet" href="styles.css" />
  </head>
  <body>
    <button onclick="addR()">Add Row</button>
    <button onclick="addC()">Add Col</button>
    <button onclick="removeR()">Remove Row</button>
    <button onclick="removeC()">Remove Col</button>
    <button onclick="fillU()">Fill All Uncolored</button>
    <button onclick="fill()">Fill All</button>
    <button onclick="clearAll()">Clear</button>
    <select onchange="selected()" id="selectedID">
      <option value="SELECT">SELECT</option>
      <option value="Red">Red</option>
      <option value="Blue">Blue</option>
      <option value="Green">Green</option>
      <option value="Yellow">Yellow</option>
    </select>
    <table id="grid"></table>
    <script src="script.js"></script>
  </body>
</html>