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<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>JS Bin</title>
</head>
<body>
  <h1>Hello</h1> 
  
  <button id="red">Turn red</button>
  <button id="blue">Turn blue</button>
  
</body>
</html>
 
function colorize(color) {
  
  return function() {
    document.body.style.color = color;
  };
  
}
var redf = colorize('red');
var bluef = colorize('blue');
document.getElementById('red').onclick = redf;
document.getElementById('blue').onclick = bluef;
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anonymouspro
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