add action wp_head not working

I am trying to add some code to the head (namely a block of tracking script) via a plugin I am making.

The plugin has an interface where the user enters some details which are then added to the options table. This is all working perfectly fine so far. But then I want to write a conditional statement if there is an open then add to head. Basically I have this all in the main plugin file and it looks like this;

if(get_option( 'MyOptionName' )){
    function testingone(){ ?>
        <script>var Script = GoesHere; </script>
    <?php ;}
    add_action('wp_head','testingone');
}

I have tried placing this inside the actual block that pulls the data and then adds to options, but that didn’t work, then I decided to do it this way, where it looks to see if there is an option in the table but this also doesnt inject anything to the head. Some places I have seen people put the add_action above the function, but in the codex it shows an example of it below. but either way I have tried and failed.

Can anyone see where this is going wrong?

Cheers

Pull the add_action() outside of the function, and put the conditional inside the callback. Also, if you’re printing a script directly, use wp_print_scripts instead of wp_head. You also have a syntax error.

function testingone(){ 
    if( get_option( 'MyOptionName' ) ) {
        ?>
        <script>var Script = GoesHere; </script>
        <?php
    }
}
add_action( 'wp_print_scripts','testingone' );