berikut script-nya
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="content-type" content="text/html" />
<meta name="author" content="fahmi" />
<title>fahmi belah ketupat</title>
<script type="text/javascript">
var i,j,y;
for(i=10;i>0;i--){
for(j=1;j<=i-1;j++){
document.write("   ");
}
for(y=1;y<=10-i+1;y++){
document.write(" * ");
}
for(l=1;l<=10-i;l++){
document.write(" * ");
}
document.write("<br>");
}
for(i=1;i<=10;i++){
for(j=1;j<=i;j++){
document.write("   ");
}
for(y=1;y<=10-i;y++){
document.write(" * ");
}
for(l=1;l<10-i;l++){
document.write(" * ");
}
document.write(" <br> ");
}
</script>
</head>
<body>
</body>
</html>
gambar dibawah ini adalah hasilnya
berikut script-nya
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="content-type" content="text/html" />
<meta name="author" content="fahmi" />
<link href="css/bootstrap.min.css" rel="stylesheet"/>
<link href="css/bootstrap.css" rel="stylesheet" style="text/css"/>
</head>
<body>
<script type="text/javascript">
var n=prompt("Masukkan nilai");
n=parseInt(n);
if (n>=70 && n<=100) {
document.write ("  <h1>anda lulus, selamat ...!</h1> <br>   anda lulus dengan nilai = "+n);
}
else if (n<70 && n>=1) {
document.write ("  <h1>anda harus belajar lagi...!</h1 <br>   nilai anda = "+n)
}
else {
document.write("salah memasukkan nilai, coba lagi")
}
</script>
</body>
</html>
gambar dibawah ini adalah hasilnya
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