Last one or two bar 8MA over 21MA

First of all i wanted to thank for your hard work for this community.
I am getting list of all the stocks which is already crossed 8MA over 21MA irrespective of number of previous bar.
Now I need your help on how to get list per below criteria.

1. Last one or two bar crossed 8MA over 21MA

I am using below script,which is working perfectly fine except one above criteria.

input lengthOne = 8;
input lengthTwo = 21;
input maTypeOne = AverageType.EXPONENTIAL;
input maTypeTwo = AverageType.EXPONENTIAL;
input priceOne = close;
input priceTwo = close;
def maOne = MovingAverage(maTypeOne, priceOne, lengthOne);
def maTwo = MovingAverage(maTypeTwo, priceTwo, lengthTwo);
plot data = maOne > maTwo;

Thanks in advance for your help.