问如何在blogger中为所有外部链接创建重定向页面

EN

<h3>Page Will Redirect After <span id="countdown">10</span> seconds</h3>

<!-- JavaScript part -->
<script type="text/javascript">
    
    // Total seconds to wait
    var seconds = 20;
    
    function countdown() {
        seconds = seconds - 1;
        if (seconds < 0) {
            // Chnage your redirection link here
            window.location = "https://www.google.com";
        } else {
            // Update remaining seconds
            document.getElementById("countdown").innerHTML = seconds;
            // Count down using javascript
            window.setTimeout("countdown()", 1000);
        }
    }
    
    // Run countdown function
    countdown();
    
</script>

With this code i made a page (example: abc.blogspot.com/p/go.html) and i add link in post "<a href="http://abc.blogspot.com/p/go.html?redirect=www.facebook.com">LINK</a>"

but it's not redirect to facebook because in code mention : "window.location = "https://www.google.com";"