Instead of using the Counter Customization I offer here, you may make quick changes to the design with the following parameters. (That's how the preview works.)

idyour user id
bgbackground color
numnumber color
digitsamount of digits
fontcharacter set

bg and num have to be specified as hexadecimal RGB values (Red Green Blue)!

For example:

<img src=""
style="width:81px;height:15px;border:none;" />

This means:

Draw a counter for user id 1, which has a black background and white numbers.
It should have at least 6 digits and uses the font tibeba.
The height and width values are obligatory, you may play with them if you want to warp the counter in some way.

And looks like: