indexOF

        int indexofx;
		if(isEmpty()) {
        	return -1;
        }
        else {
        	Node runPointer = first;
        	while(runPointer.next != null) {
        		runPointer = runPointer.next;
        		if(runPointer.equals(maschine)) {
        			indexofx = ru
        		}
        	}
        }