pixel-editor/js/_createButton.js

on('click', 'create-button', function (){
    var width = getValue('size-width');
    var height = getValue('size-height');
    newPixel(width,height,'asdfg');
    document.getElementById('new-pixel-warning').style.display = 'block';

    //get selected palette name
    var selectedPalette = getText('palette-button');
    if (selectedPalette == 'Choose a palette...') 
        selectedPalette = 'none';

    //track google event
    ga('send', 'event', 'Pixel Editor New', selectedPalette, width+'/'+height); /*global ga*/


    //reset new form
    setValue('size-width', 64);
    setValue('size-height', 64);
    setText('palette-button', 'Choose a palette...');
    setText('preset-button', 'Choose a preset...');
});