How to derive Quarter Values in Bex

Hello All,

i need to get quarter value along with 0fiscper ( 0fiscper format is 001.2019, 002.2019..etc).

we have 0fiscvar , fiscyear , 0fiscper3 in flow. Using these how can we get quarter value through routines/bex options.

if possible pls provide syntax since am new to ABAP.

Thanks

Raki