var icon = blockies.create({ // All options are optional
    seed: 'randstring', // seed used to generate icon data, default: random
    color: '#dfe', // to manually specify the icon color, default: random
    bgcolor: '#aaa', // choose a different background color, default: random
    size: 15, // width/height of the icon in blocks, default: 8
    scale: 3, // width/height of each block in pixels, default: 4
    spotcolor: '#000' // each pixel has a 13% chance of being of a third color, 
    // default: random. Set to -1 to disable it. These "spots" create structures
    // that look like eyes, mouths and noses. 
});

document.body.appendChild(icon); // icon is a canvas element