Adding your google code to a block is pretty simple. Here is how.
Steps :
Create a php file and add the following codes between your php opening and closing tags.
As you can see by the script, it's pretty simple to add your ads. Just use ( ' ) to enclose the google script. Save that file as block-Google_Ads.php upload to your blocks folder and activate it.
That's all! Visit the forum for more help.