var game = new Phaser.Game(800, 600, Phaser.AUTO, 'phaser-example', { preload: preload, create: create });

var emitter;

function preload() {

    game.load.image('diamond', 'assets/sprites/diamond.png');

}

function create() {

    game.stage.backgroundColor = 0x337799;

    emitter = game.add.emitter(0, 0, 200);

    emitter.makeParticles('diamond');
    emitter.gravity = 200;

    game.input.onDown.add(particleBurst, this);

}

function particleBurst() {

    //  Position the emitter where the mouse/touch event was
    emitter.x = game.input.x;
    emitter.y = game.input.y;

    //  The first parameter sets the effect to "explode" which means all particles are emitted at once
    //  The second gives each particle a 2000ms lifespan
    //  The third is ignored when using burst/explode mode
    //  The final parameter (10) is how many particles will be emitted in this single burst
    emitter.start(true, 2000, null, 10);

}