Method deleteArrow

js/Sign.js:112–123

(parentIndex,arrowIndex)

	}
	
	deleteArrow(parentIndex,arrowIndex) {
		var selectedArrow;
		
		for (const arrow of this.arrows) {
			if (arrow.parentIndex == parentIndex && arrow.arrowIndex == arrowIndex) {
				selectedArrow = arrow;
				break;
			}
		}
		
		this.arrows.splice(this.arrows.indexOf(selectedArrow),1);
	}
	 
	newShield(number) {
		const newShield = new Shield();