Simple modification to indicator needed

Hi there

Can any kind person out there make a simple modification to the attached indicator?

At the moment the indicator will plot an arrow when a fast MA crosses 2 slow MA's. The MA mode and period is customisable.

Can any one change it to plot an arrow when 2 fast MAs cross 2 slower MAs?

So a buy when fast ma 1 and fast 2 BOTH cross slower ma 3 AND ma 4? Vice versa for a sale.

Many thanks in advance!!

Ant