(	function() {	
		
		const distributionWidth  = 25; // Change these three constants to adjust the width and length of the spread of junk
		const distributionHeight = 0.5;
		const distributionLength =  25;
		const scanDiameter = 15000;	
		var arePhysicsOn = false; 

		var arrayFound = Entities.findEntities(MyAvatar.position, scanDiameter); 

		this.preload = function (entityID) { 
			this.entityID = entityID;
			InitializeJunkyard();
		}

		function ShowJunkyardStateText(textEntity){
			Entities.editEntity(textEntity, { text: "Dynamics "+arePhysicsOn}); 
			if (arePhysicsOn) Entities.editEntity(textEntity, { backgroundColor: {red:0,green:255,blue:0}}); 
			else  Entities.editEntity(textEntity, { backgroundColor: {red:255,green:0,blue:0}}); 
		}
	
		function SetJunkyardPhysicsEntity(junkEntity, turnPhysicsOn){
			    var myPos = Entities.getEntityProperties(junkEntity, "position").position;			   	
			   	myPos.x = Math.random()*distributionLength + 10; 
			   	myPos.y = Math.random()*distributionHeight+1;
			   	myPos.z = Math.random()*distributionWidth;
			   	if (turnPhysicsOn) { 
					Entities.editEntity(junkEntity, {dynamic : true, position: myPos, velocity:{x:0, y:0.1, z:0}});
			   	} else { 
			   		Entities.editEntity(junkEntity, {dynamic : false});
			   	}
		}

		function InitializeJunkyard( ){ 
			for( i = 0; i < arrayFound.length; i++){
				var entProps = Entities.getEntityProperties(arrayFound[i]);
				if (entProps.locked) continue; 
				if (arrayFound[i]==this.entityID) continue; 
				SetJunkyardPhysicsEntity(arrayFound[i], arePhysicsOn);
			} 
			ShowJunkyardStateText(this.entityID);
		}

	    this.mousePressOnEntity = function(entityID, mouseEvent){ 
	    	arePhysicsOn = !arePhysicsOn; 
			for( i = 0; i < arrayFound.length; i++){
				var entProps = Entities.getEntityProperties(arrayFound[i]);
				if (entProps.locked) continue;
				if (arrayFound[i]==this.entityID) continue; 
				SetJunkyardPhysicsEntity(arrayFound[i], arePhysicsOn);		
			} 
			ShowJunkyardStateText(entityID);
		};
	}
)