Confused Userscript

//here's all that I added to the original script!
function actualScript() {
    var messages = ['We need more Happy Little Trees',
                    ' \"I don\'t give hickeys to no busted bitches\" — Abraham Lincoln',
                    'Clouds are very, very free.',
                    'Tender as a mothers love... And with my mother, that was certainly true.'
                   ]; // add as many as you like
    var macros = {};
    macros[80] = {"message": "Powerups are spawning soon!  ", "toAll": false}; // P
 //more macros here, but I've elided them.  Below is the important one!
    macros[72] = {"message": messages[Math.floor(Math.random() * messages.length)],toAll:true} // H