So you posted this very question on the 16th April (a whole 7 days ago) right here:
You already got quite a comprehensive answer and FOR FREE, I should point out, since a garage will charge you anything up to £50 and possibly more just for reading the fault code!
So having gotten the help you needed and more, despite not even bothering to show a bit of common courtesy by posting an Intro in the relevant setion, you then decide to re-ask the same question... and you want to talk about who is an idiot??!!
The flashes are a Fault 19 code, which is the sidestand switch.
Clean it, lube it, replace it, bypass it or whatever you want.
When you're done doing that, grow up and learn some manners...