create particles, for threejs_playGnd

createParticles.js

  			
				/* ------------------- INSTRUCTIONS -----

				to create particles
				add the block of code below to your setup()

				-------------------------------------- */

				geometry = new THREE.Geometry();
				for ( i = 0; i < 5000; i ++ ) {
					var vertex = new THREE.Vector3();
					vertex.x = 1000 * Math.random() - 500;
					vertex.y = 1000 * Math.random() - 500;
					vertex.z = 1000 * Math.random() - 500;
					geometry.vertices.push( vertex );
				}
				material = new THREE.ParticleBasicMaterial( { size: 5, sizeAttenuation: false, transparent: true } );
				material.color.setHex( 0xff00ff );
				particles = new THREE.ParticleSystem( geometry, material );
				particles.sortParticles = true;
				scene.add( particles );

				/* -------------------------------------- 
		       		try moving spinning your particles around
		       		add the code below to your draw() function
		        	-------------------------------------- */

				particles.rotation.y = Date.now() * 0.00005;

				/* -------------------------------------- 
		       		try oscillating the hue of your particles
		       		add the code below to your draw() function
		        	-------------------------------------- */

				var time = Date.now() * 0.0005;
				h = ( 360 * ( 1.0 + time ) % 360 ) / 360;
				material.color.setHSL( h, 0.5, 0.5 );