Poner araña en tu blog

<script src='https://googledrive.com/host/0B1sh31bxfVkGYUVMRXFyeUROQ2s' type='text/javascript'></script>
<canvas id='scratch' style='width: 500px; height: 350px; margin-left: -80px; margin-top: -30px;'></canvas>
<script src='https://googledrive.com/host/0B1sh31bxfVkGbTVWTlhlangwdWM' type='text/javascript'></script>

Que se mueva al subir y bajar: 

<style>
#scratch {
position: fixed;
top: 0px;
left: 0px;
}
</style>


Opciones:
Top / Bottom
Left / Right / Center