Happy birthday

Sixteen candles,
you are going to blow,
and seventeen candles,
are ready to glow,
may the number of these candles
increase to the EXTEND
that the cake can't handle
THEM AND
my dear,
maybe your age-years,
go on increasing every year,
with the occassion,
like an arithematic progression,
with 1 as common difference,
with each 1(every year of your life)
full of delight and fragnence
of happiness,
'happy birthday'