Warning: mysqli_query() expects at least 2 parameters, 1 given. What? [duplicate]

I made a PHP page that is supposed to select two names from a database and displays them.

It just says:

Warning: mysqli_query() expects at least 2 parameters, 1 given in /home/tdoylex1/public_html/dorkhub/index.php on line 4

Warning: mysqli_query() expects at least 2 parameters, 1 given in /home/tdoylex1/public_html/dorkhub/index.php on line 8

My code is:

<?php mysqli_connect(localhost,tdoylex1_dork,dorkk,tdoylex1_dork);
$name1 = mysqli_query("SELECT name1 FROM users
ORDER BY RAND()
LIMIT 1");

$name2 = mysqli_query("SELECT name FROM users
ORDER BY RAND()
LIMIT 1");

?>

<title>DorkHub. The online name-rating website.</title>
<link rel="stylesheet" type="text/css" href="style.css">
<body bgcolor='EAEAEA'>
<center>
<div id='TITLE'>
    <h2>DorkHub. The online name-rating website.</h2>
</div>
    <p>
    <br>
    <h3><?php echo $name1; ?></h3><h4> against </h4><h3><?php echo $name1; ?></h3>
    <br><br>
    <h2 style='font-family:Arial, Helvetica, sans-serif;'>Who's sounds the dorkiest?</h2>
    <br><br>
    <div id='vote'>
    <h3 id='done' style='margin-right: 10px'>VOTE FOR FIRST</h3><h3 id='done'>VOTE

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