gistfile1.txt

//In the enemy class:

var totalTime = 0;
NormEnemy.prototype.update = function(deltaTime)
{
	totalTime = totalTime + deltaTime;
	var mathsSin = (100*(Math.sin(totalTime*3)));
	if (this.ZigZagMovement == true)
	{
		this.position.x = this.zigZagMean + mathsSin;
		this.position.y += 1;
	}
}

//The spawning of the enemy:

function NenemySpawnZigZag(zigZagPosition)
{
	var NZZenemy = new NormEnemy ();
	NZZenemy.zigZagMean = zigZagPosition;
	NZZenemy.position.set(zigZagPosition, 10);
	NZZenemy.ZigZagMovement = true;
	enemies.push(NZZenemy);
}