anchor.diff:  function createParticles(field, count) {
   	var particles = {
   		count: count,
  -		stuck: new Uint8Array(count),
  +		stuck: new Uint32Array(count),
   		x: new Uint16Array(count), 
   		y: new Uint16Array(count), 
   	};
  
positive.code:     particles.y[i] = y;
      
  	if (isNextToCluster(particles, field, i)) {
  		particles.stuck[i] = CLUSTER;
  		field.field[y*field.width + x] = CLUSTER;
  	}
  }
  ----
  
negative.code: 2. When particle is next to a cluster it sticks to it.
  3. We start with a simple seed cluster consisting of one particle in the center of the visualisation.
  
  Model is dead simple. Let's see how we can implement it and generate some pretty pictures.
  
  == View
  
  