A gist displaying how to use the static vs instance properties.

InstanceStaticExample.hx

//A class; a template for creating objects with the properties listed in the class
class Duck {
	static public var CAN_FLY:Bool = true;

	public var age:Int;

	public function new(age:Int) {
		this.age = age;
	}
}

class Test {
	static function main() {
		var ducky = new Duck(3);
		// A static property uses the class name in order to access the element
		trace(Duck.CAN_FLY);
		// ducky.CAN_FLY = false; //Try uncommenting this line and see what happens
		trace(ducky.age);
		// Using the instance variable to change the age
		ducky.age = 4;
		trace(ducky.age);
	}
}

https://try.haxe.org/#51b3Db97 You can try the example here.