node.js

if(this.particles.length) {
				var i,
					particles = this.particles,
					length = particles.length;
				
				//ctx.globalAlpha = 1;

				for(i = 0; i < length; i++){
					//ctx.globalAlpha = this.particles[i].opacity;
					
					//ctx.strokeStyle = "rgba(255,255,255,"+this.particles[i].opacity+")";
					ctx.save();
					ctx.clearRect(this.particles[i].prevX, this.particles[i].prevY, this.particles[i].size + 0, this.particles[i].size + 0);
					
					ctx.moveTo(this.particles[i].x, this.particles[i].y);
					ctx.lineTo(this.particles[i].x + this.particles[i].size, this.particles[i].y + this.particles[i].size);
					
					ctx.moveTo(this.particles[i].x, this.particles[i].y + this.particles[i].size);
					ctx.lineTo(this.particles[i].x + this.particles[i].size, this.particles[i].y);
					
					ctx.lineWidth = 1;
					ctx.strokeStyle = "rgba(255,255,255,"+this.particles[i].opacity / 2+")";
					
					
					
					
					//ctx.translate(this.particles[i].x, this.particles[i].y);
					//ctx.rotate(30*Math.PI/180);
					ctx.stroke();
					ctx.strokeStyle = "rgba(255,255,255,"+this.particles[i].opacity+")";
					ctx.strokeRect(this.particles[i].x, this.particles[i].y, this.particles[i].size, this.particles[i].size);
					ctx.restore();
					
				}
			}